December 20, 2024 , and

2024 Tree Fruit IPM Post Season Summary

Observation Overview: The IPM observations for 2024 come from the North and South Jersey Tree Fruit IPM Programs. There are 29 farms that participate in the North Jersey program and 13 farms in the South Jersey Program. The program includes approximately 600 acres of apples and 1,650 acres of peaches. Each farm has traps for the pests included in the trap data and are scouted once a week. The data for the charts below comes from the NEWA model, using Snyder Farm in Pittstown as the weather station. The trap data comes from each of the farms in the program and excludes farms using mating disruption. This is because the mating disruption proved to be very effective this year and I had no or very low trap catches in orchards utilizing this method of control. 

2024 Weather: Using the weather data from our Snyder research farm in Pittstown, New Jersey (Hunterdon County), the weather (highs, lows and precipitation), was average for the 2024 growing season. There were no notable statewide frost events in the spring however, in our most northern counties we experienced temperatures of 27°F on 4/8/2024 (during tight cluster) and again on 4/22/2024 (during bloom) which affected some of the blossoms but overall, did not affect crop load. However, the high temperatures were sustained above 80 °F for much of June through August. Precipitation was above the 20-year normal until May and then dropped to about half of normal from June-July, then seemingly increased in August but that was largely due to a very large squall that occurred at the Pittstown research station at the beginning of August. There was a hailstorm that occurred in Sussex and Warren counties on 7/16 which resulted in significant crop loss for some growers.  

   March  April  May  June  July   August  September  October 
Hunterdon, NJ: 30 year normal precipitation  4.05  3.92  4.18  4.55  5.04  4.61  4.53  4.36 
Hunterdon NJ: 2024 precipitation  6.89  4.97  4.16  2.21  3.28  6.83  .99  .02 

Datasources: 

https://climate.rutgers.edu/stateclim_v1/nclimdiv/# 
https://www.njweather.org/data/daily 

 

Fireblight: Fireblight presented an issue during the blossom blight phase for growers in both North and South Jersey. As you can see from the chart below, which pulls data from the NEWA fireblight model using the weather station in Pittstown, New Jersey, there were at least two infection periods during bloom where the EIP value was over 100. One of these periods persisted over the course of 5 days which required two applications of an antibiotic, 3 days apart from each other for optimal control. 


Apple Scab: Compared to last year, we experienced more scab infection periods during the primary scab phase. Most of these infection periods spanned over a couple days with the longest period lasting 5 days. Most growers were able to avoid primary scab by applying effective fungicides prior to NEWA predicted infection periods. There were a few orchards with heavy scab pressure that experienced major scab outbreaks with over 20% infected fruit found in post-harvest assessments. If growers experienced heavy scab pressure this year, it is recommended to apply urea and mow the leaves once they have fallen from trees to reduce the inoculum moving into the next season.  

 

Rots: Bitter Rot remains the most challenging to control throughout all New Jersey orchards. Incidence of this disease occurred in almost all farms in our Tree Fruit IPM Program and appeared most devastating in the Honeycrisp, Empire, Ambrosia and Evercrisp varieties. It may be beneficial to remove infected apples from the trees at the end of this season to reduce inoculum moving into the next season. Some of the most effective fungicides to include in cover sprays are Captan, Aprovia, Omega, Merivon, Luna Sensation and Topsin. These all work best when applied before a wetting event. In South Jersey, White Rot was also prevalent this season, we did not experience this in our North Jersey counties.   

Cedar Apple Rust and Quince Rust: In Southern New Jersey these diseases, particularly Quince Rust, are becoming more prevalent, especially in Asian Pear. In North Jersey, we also saw a higher incidence of these diseases compared to last season. It is important to begin applying effective materials from pink through first cover.  

Nectria Canker: This disease has not presented a major issue in New Jersey in previous years and when it has shown up, it has typically been on varieties that are known to be susceptible. This year one grower experienced this disease on the MAIA variety, Ludacrisp. Almost every tree in the row was infected with multiple cankers per tree.  

Bacterial Spot: In South Jersey control of this disease was very good. In North Jersey there was more incidence of this disease than last year with 4 farms having minor outbreaks. Growers should begin including effective materials for this disease as soon as green leaf tissue is present. For resistance management growers should rotate between copper and oxytetracycline (Fireline or Mycoshield). It is important to remember that combining copper and captan will can cause phytotoxicity to the leaves which may be exacerbated in slow drying conditions.  

Peach Scab: Control of this disease remains very good in commercial orchards across both North and South Jersey.  

Brown Rot: This disease did not present a major issue in North or South Jersey this season. In North Jersey, most growers had less than 2% crop loss caused by brown rot.  

Codling Moth: In South Jersey, a biofix was set for this pest on 4/22 which is 3 days later than last year. A biofix was set for this pest on 5/1 for five North Jersey counties (Middlesex, Mercer, Hunterdon, Warren, and Sussex counties) and on 5/6 for one North Jersey county (Morris County) which is 3-4 days earlier than last year. Across the state, trap captures were lower than average, but this pest was more damaging than last year. This season, all 3 generations of this pest caused damage in orchards which are known to have high pest pressure. Mating disruption remained effective in most blocks, but small amounts of damage were found at one farm which had irregularly shaped blocks. In Southern New Jersey, over the last 3 seasons there has been incidence of another internal feeder which is believed to be lesser apple worm. In North Jersey damage of this pest was noted in one orchard on 10/15. 

Brown Marmorated Stinkbug: In both North and South Jersey, trap counts for this pest were higher than the past few seasons. There was also a higher incidence of damage found in post-harvest assessments of Pome fruit. In North Jersey, there was also a higher incidence of damage to Stone fruit compared to last season. 

Ambrosia Beetle: In North Jersey, we began a monitoring program for this pest this year utilizing clear sticky traps baited with Trece’s ethanol lures and wood dowel traps. We had significant trap captures, and this pest attacked the wood dowel traps at all 29 farms in our program. This pest only attacked apples at 4 of the 29 farms, 3 of which were previously known infestation sites. The one farm which had not previously experienced crop loss to this pest experienced 43.3% loss of the trees they had topworked at the beginning of the season. In South Jersey, tree loss continued at normal levels in known infestation sites. The best management practice for control of this pest is reducing tree stress through cultural techniques.  

Scale: In South Jersey, incidence of San Jose Scale infestation increased over the last season. Early season controls suppressed crawler populations, however, damage in August was notable in many orchards. In North Jersey, this pest did not cause notable damage except in known problem areas. White Peach Scale was observed at slightly increased levels in orchards across the state. The late generation of this pest continues to cause damage to later ripening peach varieties in North Jersey. Dormant oil sprays at the beginning of next season will help manage this pest. Ensuring proper coverage of these sprays is essential for control.  

Oriental Fruit Moth: A biofix for this pest was set on 4/10 in South Jersey and 4/12 in North Jersey. This pest did not present a major issue to growers across the state this season. Only a few growers had a small incidence of damage to their peaches found in post-harvest assessments.  

Plum Curculio: Plum curculio damage was above average in stone fruit. This pest also caused significant damage to pome fruit due to the long bloom period which made control difficult.  

 

Filed Under: Tree Fruit Tagged With: , , , , , ,
May 24, 2023

Tree Fruit IPM Report for May 25, 2023

Peach:

Bacterial Spot: Generally we recommend starting at 0.5 ozs metallic copper and gradually lowering the rate as the season progresses. The rate applied will depend on the formulation. Dr. Lalancette published a chart listing common copper formulations and rates for peach and nectarine applications. Avoid combining copper with captan especially if it has been overcast for several days. Also avoid acidic spray solutions when applying copper. Dr. Lalancette has published a handy guide for copper applications in early covers. Antibiotics such as Mycoshield or Fireline may also be used and may offer slightly more residual activity during long wetting periods. Bacterial Spot leaf symptoms have began appearing in southern county orchard during the week of 5/8. These infections probably occurred mostly during the heavy rains that occurred on 4/30-5/1. Fruit symptoms from this set of infections have so far not appeared. This week no significant increase in symptoms was noted.

Oriental Fruit Moth: A biofix point for OFM was set on 4/10 in both northern and southern counties.  All timings for first generation OFM have past.

OFM 2nd Generation Timing
Insecticide Type
County/Region Degree Days by  5/24 base 45 Conventional

1450-1500

 Diamide

1300-1400
Gloucester – Southern 603 1st –too far off

2nd – too far off

 1st –too far off

2nd – too far off
Middlesex – Northern 578 1st –too far off

2nd – too far off

 1st –too far off

2nd – too far off

Plum Curculio; Tarnished Plant Bugs; and Other Catfacing Insects: Plum Curculio start to move into orchards at about 88-100 degree days base 50 after January 1. Applications for PC should be initiated once all petals are off, with a second application made with ovicidal materials at 379-402 DD. Additional applications with effective materials may be made between 520 and 730 DD base 50. Currently we have accumulated about 498 DD base 50 in southern counties, and 426 DD base 50 in northern counties. Growers can monitor degree day development at their site by finding the nearest weather station and using the degree day development tool at NEWA. Catfacing insects are active, but will become more of an issue as temperatures warm and mowing and other ground cover activities become more common.

Scale Insects: White peach scale crawlers have begun emergence in southern counties and will continue emergence for the next few weeks. San jose scale crawlers typically begin emergence about late May or Early June and continue emergence for up to 6 weeks. Control options during crawler emergence include Neonicitiniods (suppression only), and the IGR’s Esteem and Centaur. See the NJ Commercial Tree Fruit Production Guide and the product labels for more information.

Apples and Pears:

Diseases: Now that primary scab is nearing the end, or has ended, the focus turns toward summer diseases such as fruit rots (esp. Bitter rot), and sooty blotch and fly speck. Bitter rot control has been difficult at best in recent years even where management programs have been rigorous. Research has suggested Products such as Merivon, Luna Sensation and Inspire Super may be effective, and longtime reliable broad spectrum fungicides such as captan and ziram should provide control. Experience has suggested that the addition of phosphorous acid products such as Prophyt or Rampart to captan sprays may improve control. Observations are that these products improve control of other summer diseases such as sooty blotch and flyspeck, and may help suppress scab infections where present.

Fire Blight: Infections can still occur post bloom so covers with antibiotics when infection events are forecast using the NEWA fire blight model may be beneficial. Remember to rotate streptomycin and oxytetracycline products. Fire Blight symptoms began appearing in southern county apple and pear orchards the week of 5/1. Typically it is recommended to cut out infected limbs however this is a practical decision that must be made. This blog post from Michigan State may be helpful to decide whether it is worth cutting out infected tissue.

Codling Moth (CM): The first codling moth flight has started. A biofix was set for CM on April 17th in both northern and southern counties.

Codling Moth Degree Day Timing
Application and Insecticide Type
County Area Biofix Rimon:

75-100DD + 14-17 days later

 

 Intrepid

150 + 450 DD

Diamides – Altacor, Voliam mixes: (150-200 DD)

 Cyd-X, Carpovirusine

250 DD + every 7-9 days during brood hatch (later if first spray is an IGR)

 Standard Insecticides –  Delegate, Avaunt, OP’s, carbamates, pyrethroids

250 DD + 550 DD

 
DD 75 100 150 450 250 250 550
Southern April 17 past past past 6/4 5/21 5/21 6/7
Northern  past  past  past 6/6 5/23 5/23 6/11

Tufted Apple Budmoth (TABM): A biofix for TABM was set in southern county orchards on 5/8. Nothing needs to be done for TABM at this point. The first alternate middle applications for TABM will be on or about 6/3 in southern counties. This has been considered a minor pest in recent years. Many materials used for Codling Moth will also control TABM.

Pear:  Second generation pear psylla began hatching about 5/15. Options for control include spynosyn products such as Delegate and Entrust, and the neocitinoids (IRAC group 4A). The addition of 0.25-1 gal of summer oil may improve control. Other options include Movento, and products containing abamectin. Be sure to read and follow the label instructions regarding the addition of penetrants for these products.

Tree Fruit Trap Captures – Southern Counties

STLM TABM-A CM BMSB OFM-A DWB OFM-P TABM-P LPTB PTB
4/15/2023 433 20 1
4/23/2023 423 1 13 8 4
4/30/2023 417 7 15 4 1 0
5/06/2023 9 2 3 1 0 0
5/13/2023 18 2 7 2 3 0 6 6
5/20/2023 5 18 6 0 51 0 13 67

Tree Fruit Trap Captures – Northern Counties

STLM TABM-A CM BMSB OFM-A DWB OFM-P TABM-P LPTB PTB
4/8/2023 10
4/15/2023 20 3
4/30/2023 28 11 6
5/06/2023 22 2 19 9
5/13/2023 34 1 3 2 5 0
5/20/2023 31 6 7 1 6 0

Phenology Table: Based on annual observations made in Gloucester County.

Pest Event or Growth Stage Approximate Date 2023 Observed Date
 Bud Swell (Redhaven)  March 23 +/- 15 Days March 7
1/4″ Green Tip Red Delicious March 31 +/- 13 Days March 27
Pink Peach (Redhaven) April 4 +/- 15 Days March 24
Tight Cluster Red Delicious April 9 +/- 13 Days April 7
Full Bloom Peach (Redhaven) April 9 +/- 14 Days April 4
Pink Apple (Red Delicious) April 14 +/- 12 Days April 11
Full Bloom Apple (Red Delicious) April 22 +/- 11 Days April 16
Petal Fall (Redhaven) April 22 +/- 10 Days April 15
Petal Fall (Red Delicious) April 27 +/- 13 Days  May 3
Shuck Split (Redhaven) April 30 +/- 11 Days April 21
Pit Hardening June 15 +/- 9 Days

 

 

 

Filed Under: Tree Fruit, Uncategorized Tagged With: , , , ,
May 17, 2023 and

Tree Fruit IPM Report for May 18. 2023

Peach:

Bacterial Spot: Generally we recommend starting at 0.5 ozs metallic copper and gradually lowering the rate as the season progresses. The rate applied will depend on the formulation. Dr. Lalancette published a chart listing common copper formulations and rates for peach and nectarine applications. Avoid combining copper with captan especially if it has been overcast for several days. Also avoid acidic spray solutions when applying copper. Dr. Lalancette has published a handy guide for copper applications in early covers. Antibiotics such as Mycoshield or Fireline may also be used and may offer slightly more residual activity during long wetting periods. Bacterial Spot leaf symptoms have began appearing in southern county orchard during the week of 5/8. These infections probably occurred mostly during the heavy rains that occurred on 4/30-5/1. Fruit symptoms from this set of infections should begin appearing soon. This week no increase in symptoms was noted.

Oriental Fruit Moth: A biofix point for OFM was set on 4/10 in both northern and southern counties.  All timings for first generation OFM have past. Second generation timings are updated below:

OFM 2nd Generation Timing
Insecticide Type
County/Region Degree Days by  5/17 base 45 Conventional

1450-1500

 Diamide

1300-1400
Gloucester – Southern 496 1st –too far off

2nd – too far off

 1st –too far off

2nd – too far off
Middlesex – Northern 482 1st –too far off

2nd – too far off

 1st –too far off

2nd – too far off

 

Plum Curculio; Tarnished Plant Bugs; and Other Catfacing Insects: Plum Curculio start to move into orchards at about 88-100 degree days base 50 after January 1. Applications for PC should be initiated once all petals are off, with a second application made with ovicidal materials at 379-402 DD. Currently we have accumulated about 425 DD base 50 in southern counties, and 366 DD base 50 in northern counties. Growers can monitor degree day development at their site by finding the nearest weather station and using the degree day development tool at NEWA. Catfacing insects are starting activity, but will become more of an issue as temperatures warm and mowing and other ground cover activities become more common.

Scale Insects: White peach scale crawlers have not yet emerged but usually begin emergence about the third week of May and continue emergence until about the middle of June. San jose scale crawlers typically begin emergence about late May or early June and continue emergence for up to 6 weeks. Control options during crawler emergence include Neonicitiniods (suppression only), and the IGR’s Esteem and Centaur. See the NJ Commercial Tree Fruit Production Guide and the product labels for more information.

Apples and Pears:

Diseases: Now that primary scab is nearing the end, or has ended, the focus turns toward summer diseases such as fruit rots (esp. Bitter rot), and sooty blotch and fly speck. Bitter rot control has been difficult at best in recent years even where management programs have been rigorous. Research has suggested Products such as Merivon, Luna Sensation and Inspire Super may be effective, and longtime reliable broad spectrum fungicides such as captan and ziram should provide control. Experience has suggested that the addition of phosphorous acid products such as Prophyt or Rampart to captan sprays may improve control. Observations are that phosphorous acid products improve control of other summer diseases such as sooty blotch and flyspeck, and may help suppress scab infections where present.

Fire Blight: Infections can still occur post bloom so covers with antibiotics when infection events are forecast using the NEWA fire blight model may be beneficial. Remember to rotate streptomycin and oxytetracycline products. Fire Blight symptoms began appearing in southern county apple and pear orchards the week of 5/1. Typically it is recommended to cut out infected limbs however this is a practical decision that must be made. This blog post from Michigan State may be helpful to decide whether it is worth cutting out infected tissue.

Codling Moth (CM): The first codling moth flight has started. A biofix was set for CM on April 17th in both northern and southern counties. Treatment timings are updated below:

Codling Moth Degree Day Timing
Application and Insecticide Type
County Area Biofix Rimon:

75-100DD + 14-17 days later

 

 Intrepid

150 + 450 DD

Diamides – Altacor, Voliam mixes: (150-200 DD)

 Cyd-X, Carpovirusine

250 DD + every 7-9 days during brood hatch (later if first spray is an IGR)

 Standard Insecticides –  Delegate, Avaunt, OP’s, carbamates, pyrethroids

250 DD + 550 DD

 
DD 75 100 150 450 250 250 550
Southern April 17 past past past Too far off 5/20 5/20 Too far off
Northern April 17  past  past  past Too far off 5/22 5/22 Too far off

 

Pear:  Second generation pear psylla began hatching about 5/15 in southern counties. Options for control include spynosyn products such as Delegate and Entrust, and the neocitinoids (IRAC group 4A). The addition of 0.25-1 gal of summer oil may improve control. Other options include Movento, and products containing abamectin. Be sure to read and follow the label instructions regarding the addition of penetrants for these products.

Tree Fruit Trap Captures – Southern Counties

STLM TABM-A CM BMSB OFM-A DWB OFM-P TABM-P LPTB PTB
4/15/2023 433 20 1
4/23/2023 423 1 13 8 4
4/30/2023 417 7 15 4 1 0
5/06/2023 9 2 3 1 0 0
5/13/2023 18 2 7 2 3 0 6 6

Tree Fruit Trap Captures – Northern Counties

STLM TABM-A CM BMSB OFM-A DWB OFM-P TABM-P LPTB PTB
4/8/2023 10
4/15/2023 20 3
4/30/2023 28 11 6
5/06/2023 22 2 19 9
5/13/2023 34 1 3 2 5 0

Phenology Table: Based on annual observations made in Gloucester County.

Pest Event or Growth Stage Approximate Date 2023 Observed Date
 Bud Swell (Redhaven)  March 23 +/- 15 Days March 7
1/4″ Green Tip Red Delicious March 31 +/- 13 Days March 27
Pink Peach (Redhaven) April 4 +/- 15 Days March 24
Tight Cluster Red Delicious April 9 +/- 13 Days April 7
Full Bloom Peach (Redhaven) April 9 +/- 14 Days April 4
Pink Apple (Red Delicious) April 14 +/- 12 Days April 11
Full Bloom Apple (Red Delicious) April 22 +/- 11 Days April 16
Petal Fall (Redhaven) April 22 +/- 10 Days April 15
Petal Fall (Red Delicious) April 27 +/- 13 Days  May 3
Shuck Split (Redhaven) April 30 +/- 11 Days April 21
Pit Hardening June 15 +/- 9 Days

 

 

 

Filed Under: Tree Fruit Tagged With: , , , ,
April 26, 2023 and

Tree Fruit IPM Report for April 27, 2023

Tree Fruit Phenology: Tree Fruit Phenology remains advanced in peach. In southern counties all peach orchards are shuck split to shuck off. Redhaven was at approximately full bloom on April 4. Red Delicious is at 90% petal fall. Sweet cherries are at about petal fall to shuck split depending on variety.

Peach:

Bacterial Spot: Generally we recommend starting at 0.5 ozs metallic copper and gradually lowering the rate as the season progresses. The rate applied will depend on the formulation. Dr. Lalancette published a chart listing common copper formulations and rates for peach and nectarine applications. Avoid combining copper with captan especially if it has been overcast for several days. Also avoid acidic spray solutions when applying copper. Dr. Lalancette has published a handy guide for copper applications in early covers. Antibiotics such as Mycoshield or Fireline may also be used and may offer slightly more residual activity during long wetting periods.

Peach Scab: In addition to Rusty Spot and Bacterial Spot, Peach Scab requires protective applications starting at petal fall. Peach scab cankers (Fig. 1) begin to expand at bloom and by shuck split begin to shed spores during wetting periods. Topsin, Topsin/Captan combinations, Flint Extra, Inspire Super, and especially Quadris Top applied at petal fall are the best materials for blocks that had scab last year. Quadris Top, Flint Extra or Topsin should be used at the high rate to suppress overwintering lesions on the wood. Quadris Top contains azoxystrobin which is phytotoxic to many apple varieties. Phytotoxic residues can remain in the tank for long periods after an application is made, even if a tank cleaner is used. Do not use Quadris Top or Abound in the same sprayer used for apples. Bravo (chlorothalonil) is also a good protectant that may be applied no later than shuck split. Captan is also helpful in cover sprays after shuck split where scab was troublesome last year.

Peach Scab lesions on peach twig

Fig. 1 Peach Scab lesions on peach twig.

Oriental Fruit Moth: A biofix point for OFM was set on 4/10 in both northern and southern counties.  The first of two insecticide timings for first generation Oriental Fruit Moth control fall at 170-200 degree days base 45 after biofix. This timing generally coincides with 100% petal fall in peaches. Timings are updated below. Do not apply insecticides until all bloom is off. No Insecticides for OFM are needed where Mating Disruption is implemented.

OFM 1st Generation Timing
Insecticide Type
County/Region Degree Days by  4/25 base 45 Conventional

170-200, 350-375

 Diamide

100-150, 300-350
Gloucester – Southern 224 1st –4/20-4/22

2nd –5/8-5/10

 1st –4/15-4/19

2nd –5/3-5/8
Middlesex – Northern 219 1st –4/20-4/22

2nd –5/8-5/10

 1st –4/15-4/18

2nd –5/3-5/8

Green Peach Aphid: GPA colonies begin forming sometime during bloom. Examine trees for the presence of colonies from pink to shuck split. Count the number of colonies on ten trees and use a treatment threshold of 2 colonies/tree at petal fall for peach, and 1 colony/tree for nectarine. The best way to scout for aphids during bloom is with a beating tray. Blossoms may also be collected, opened, and examined for the presence of aphids using a hand lens. This is particularly important for nectarine blocks. Check 10 trees per block with the beating tray. Collect 50 blossoms per block and examine for the presence of aphids. If more than 1 colony of aphids are found in nectarines, or 2-3 colonies are found in peaches, an insecticide for aphids will be needed when all petals are off. See the NJ Commercial Tree Fruit Production Guide for recommended materials and rates. Aphid colonies are now visible in southern county orchards.

Plum Curculio; Tarnished Plant Bugs; and Other Catfacing Insects: Plum Curculio start to move into orchards at about 88-100 degree days base 50 after January 1. Applications for PC should be initiated once all petals are off, with a second application made with ovicidal materials at 379-402 DD. Currently we have accumulated about 258 DD base 50 in southern counties, and 208 DD base 50 in northern counties. Growers can monitor degree day development at their site by finding the nearest weather station and using the degree day development tool at NEWA. Catfacing insects are starting activity, but will become more of an issue as temperatures warm and mowing and other ground cover activities become more common. Insecticides for catfacing insects are not recommended until after all petals are off.

Scale Insects: Dormant oil applications are standard recommendations for scale control but in some years when conditions are not optimal for oil application scale control may be less than desired. Where oil was not applied or in orchards and where scale is a recurring problem, an application of Movento between petal fall and shuck split should “clean up” problem blocks. Movento should be applied at 6-9 ozs./ac. A penetrant must be included as per the product label. Movento will also control green peach aphid when used at this timing.

Lesser and Greater Peach Tree Borers: Growers using mating disruption for borer control can begin placing dispensers around the end of April and should have them in place by mid-May.

Apples and Pears:

Diseases: Fire Blight, Apple Scab, Rust diseases, and Powdery Mildew are the main targets at this stage. The NEWA apple scab model is estimating about 93% ascospore maturity as of 4/25 in southern NJ with 81% of cumulative ascospores discharged. Northern counties were at Green tip on or about 4/3. The model estimates about 64% ascopsore maturity for Northern Counties with 52% ascospores released. Primary apple scab spores are released during any substantial infection period. More information can be found in this blogpost from Penn State. Between tight cluster and first cover include products effective  for powdery mildew and cedar apple rust. To manage Fire Blight in both apples and pears, consider using Kasumin at bloom. Kasumin is an antibiotic like Streptomycin and Oxytetratracycline. It contains Kasugamycin which is a different chemistry. Kasumin is only labeled for bloom and petal fall applications while strep and oxytet are labeled for post bloom use. Using 3 different chemistries in rotation allows for resistance management while extending the protection into the post bloom period when late blossoms typically appear which ever material you use, the addition of Actigard or other plant defense elicitors may improve control.

Rust Diseases: The two most common rust diseases that affect pome fruit are Quince Rust and Cedar Apple Rust. In some years these diseases can be troublesome in commercial orchards. Most disease control programs for scab will also control rust. In organically managed blocks in the east options are limited for approved materials that are effective for rust. Potassium Bicarbonate products have shown good efficacy for rust diseases in trials performed in Virginia. Organic growers should seek out and plant rust resistant cultivars. Cultural controls are not practicable due to the widespread presence of alternate host Junipers both wild and cultivated. Rust disease development on junipers should now be producing large spore releases during wetting periods. See this link for pictures of rust on pome fruit and juniper.

Codling Moth (CM): The first codling moth flight has started. A biofix was set for CM on April 17th in southern counties. No biofix has yet been set for northern counties.

Codling Moth Degree Day Timing
Application and Insecticide Type
County Area Biofix Rimon:

75-100DD + 14-17 days later

 

 Intrepid

150 + 450 DD

Diamides – Altacor, Voliam mixes: (150-200 DD)

 Cyd-X, Carpovirusine

250 DD + every 7-9 days during brood hatch (later if first spray is an IGR)

 Standard Insecticides –  Delegate, Avaunt, OP’s, carbamates, pyrethroids

250 DD + 550 DD

 
DD 75 100 150 450 250 250 550
Southern April 17 4/29 5/2 5/7 Too far off 5/17 5/17 Too far off
Northern

Rosy Apple Aphid:  If a pre-bloom application was not made, monitor for colonies during bloom and use a treatment threshold of 1 colony/tree at petal fall. Some orchards have colonies that require treatment in southern counties.

Pear Psylla:  Dormant oil applications should have already been started to deter psylla egg laying. At the green cluster stage a pyrethroid is generally included with oil to knock down adults migrating into the orchard.  In lieu of oil, Surround may also be applied starting at swollen bud and continued through petal fall. If using Surround through the bloom period stop at petal fall and switch to applications of 1% summer oil @ 1gal/ac in no less than 150 gals/ac. these should be made at no more than 2 week intervals. At petal fall insecticide options for Psylla control include Actara, Assail, Belay, Movento, Sivanto Prime, and Agri-mek. See the NJ Commercial Tree Fruit Production Guide for recommended materials and rates.

Pear Diseases:  Include effective materials such as Ziram or EBDC formulations for Pear Scab and Rust diseases beginning at the cluster bud stage. At white bud use products effective for pear scab, rusts, and fabrea leaf spot. For both apples and pears, consider using Kasumin at bloom. Kasumin is an antibiotic like Streptomycin and Oxytetratracycline. It contains Kasugamycin which is a different chemistry. Kasumin is only labeled for bloom and petal fall applications while strep and oxytet are labeled for post bloom use. Using 3 different chemistries in rotation allows for resistance management while extending the protection into the post bloom period when late blossoms typically appear. which ever material you use, the addition of Actigard or other plant defense elicitors may improve control.

SLF Nymph on grape leaf

Fig2 . SLF Nymph on grape leaf.

Grapes: The most important diseases to manage at this time are Phomopsis and Powdery Mildew. At 3″ growth start managing for Black Rot. More information about early season disease control can be found in this blogpost from Virginia Tech. Insect pests to monitor are Grape Flea Beetle, and Climbing Cutworms. Controls for these insects are rarely needed. If control is determined to be necessary, use one of the materials recommended in the New Jersey Commercial Grape Production Guide. SLF hatch began in southern counties sometime last week. (Fig. 2). There is no need to control SLF at this time.

 

 

 

 

 

STLM TABM-A CM BMSB OFM-A DWB OFM-P TABM-P LPTB PTB
4/15/2023 433 20 1
4/23/2023 423 1 13 8 0

Tree Fruit Trap Captures – Northern Counties

STLM TABM-A CM BMSB OFM-A DWB OFM-P TABM-P LPTB PTB
4/8/2023 10
4/15/2023 20 3

Phenology Table: Based on annual observations made in Gloucester County.

Pest Event or Growth Stage Approximate Date 2023 Observed Date
 Bud Swell (Redhaven)  March 23 +/- 15 Days March 7
1/4″ Green Tip Red Delicious March 31 +/- 13 Days March 27
Pink Peach (Redhaven) April 4 +/- 15 Days March 24
Tight Cluster Red Delicious April 9 +/- 13 Days April 7
Full Bloom Peach (Redhaven) April 9 +/- 14 Days April 4
Pink Apple (Red Delicious) April 14 +/- 12 Days April 11
Full Bloom Apple (Red Delicious) April 22 +/- 11 Days April 16
Petal Fall (Redhaven) April 22 +/- 10 Days April 15
Petal Fall (Red Delicious) April 27 +/- 13 Days
Shuck Split (Redhaven) April 30 +/- 11 Days April 21
Pit Hardening June 15 +/- 9 Days

 

Filed Under: Tree Fruit, Uncategorized, Wine Grape Tagged With: , , , , ,
August 26, 2022

Tree Fruit IPM Report for August 25, 2022

Peach:

Oriental Fruit Moth: A biofix point for OFM was set on 4/11 in southern counties, and on 4/14 in northern counties. The third generation timings are are over in all regions. Additional treatments should be made if trap captures are over 6 moths per trap.

Insecticide Type
County/Region Degree Days by  7/28 base 45 Conventional

2000-2100 2350-2450

 Diamide

2025–2150 2375-2450
Gloucester – Southern 2437 1st –past

2nd –Past

 1st –past

2nd –past
Middlesex – Northern 2394 1st –past

2nd –past

 1st –past

2nd –past

Apples and Pears:

Brown Marmorated Stink Bugs: Brown Marmorated Stink bugs are present at low to moderate levels in orchards statewide, However Activity is incresing form both Native and Invasive species. BMSB nymphs have also been seen in some orchards. See the NJ Tree Fruit Production guide for effective materials. In addition to the apple materials listed in the guide, Venerate has a +++ rating for stink bugs and a 0 day PHI.

Codling Moth (CM): Timings for the second generation are updated below.  A biofix was set for CM on April 25th in southern counties, and May 6 in Northern counties (Middlesex County). Second generation treatments according to the degree day model are now over. Additional treatments should be made if trap captures are over 5 moths/trap. Some orchards have had continuing trap captures above threshold.

Codling Moth Degree Day Timing
Application and Insecticide Type
County Area Biofix Intrepid; Diamides – Altacor, Voliam mixes:

1150-1200 +

1450-1500 DD

 

 Cyd-X, Madex

1250 DD + every 7-9 days during brood hatch (later if first spray is an IGR)

 Standard Insecticides –  Delegate, Avaunt, OP’s, carbamates, pyrethroids

1250 DD +

1550-1600 DD

 
DD 1150-1200 1450-1500 1250 1250 1550-1600
Southern April 25 Past Past Past Past Past
Northern May 6 Past past Past Past Past

Lesser Appleworm: Some orchards in southern counties have had internal worm damage that we think is Lesser Apple Worm. This sporadic pest sometimes shows up in late summer and fall. The damage is similar to codling moth. Larvae complete their life cycle quickly and often by the time damage is seen the larvae is already gone. Typically LAW will feed in the fruit calyx and not go into the flesh, however they may also feed on fruit flesh excavating a small hole under the skin and occasionally tunneling into the fruit. Control options are the same as for codling moth.

Grape

Bunch Rots: Disease management continues to focus on downy and powdery mildew and also turns to bunch rot management. Refer to the NJ Commercial Grape Production Guide as well as the linked presentation from Dr. Nita in Virginia. Additional information can be found in this linked presentation from Dr. Bryan Hed at Penn Sate.

Grape Berry Moth: The timing for the third generation is past. In some hot summers a fourth generation may occur, however no further treatments should be needed, especially where insecticides are being applied for SLF and SWD.

Drosophilds and Sour Rot: SWD adults are being caught in and around commercial vineyards. As the sugars start to increase in early verities like Chardonnay, be aware of Spotted Wing Drosophila combined with native fruit fly species. These populations increase at this time of year and help spread sour rot. Sour rot will only be present when you also have injured fruit. Fruit splits and various insects can help cause that initial injury. It is thought that the spotted wing drosophila (SWD), because of its saw-like ovipositor, can help cause this initial injury, helping to make the fruit more attractive to native drosophilid species.  After injury the fruit serves as a food source for ethanol-producing yeasts and acetic acid producing bacteria, the causal agents of sour rot. This in turn attracts more fruit flies to lay more eggs and spread the decay. Good canopy management for air circulation is useful to reduce sour rot incidence. However, this must be combined with insecticides and antimicrobials. A treatment regime that consists of weekly applications of an insecticide (Mustang Maxx (or other pyrethroid), Malathion, Delegate/Entrust, Verdepryn).  Add Oxidate 2.0 if fruit cracking from rain or other causes is observed. Since it is important to rotate insecticide classes when treating this often, growers should use no pyrethroid or other insecticide class more that 2 times in a row. These treatments should be started before the onset of visible sour rot and fruit fly presence.

Spotted Lantern Fly: Spotted lantern fly adults are now appearing in vineyards. At this stage border treatments with effective materials should be adequate since most adults will be found on vineyard edges and populations will be low. As we move into September adult migration will increase and at that point growers should apply materials with long residual efficacy (refer to the table from Penn Sate below. *Chlorpyrifos is no longer labeled for food use.) More information on biology and control can be found from Penn State.

 

 

Tree  Fruit Trap Counts – Southern Counties

Weekending STLM TABM-A CM BMSB OFM-A DWB OFM-P TABM-P LPTB PTB
4/9/2022 2 0 0
4/16/2022 0 2 3
4/23/2022 11 0 0 28 5 0 0
4/30/2022 5 0 1 31 4 0 0
5/7/2022 5 1 3 50 4 0 0
5/14/2022 8 5 3 19 2 0 0
5/21/2022 3 5 5 20 2 7 3
5/28/2022 0 19 3 13 0 11 36
6/4/2022 0 10 3 5 1 13 49 0
6/11/2022 0 9 2 6 36 0 8 47 3
6/18/2022 0 4 1 0 62 0 3 13 1
6/25/2022 16 0 0 6 3 16 0 0 18 4
7/2/2022 24 0 0 6 3 24 0 0 18 4
7/9/2022 10 4 2 15 6 31 0 0 15 3
7/16/2022 2 0 7 1 5 12 0 0 5 7
7/23/2022 15 0 5 1 2 12 0 0 14 2
7/31/2022 16 2 5 2 4 12 1 1 11 3
8/6/2022 10 0 4 0 3 31 2 0 21 4
8/13/2022 3 1 4 1 3 37 2 0 41 7
8/20/2022 1 1 9 4 6 56 2 2 21 6

 

Tree  Fruit Trap Counts – Northern Counties

Weekending STLM TABM-A CM BMSB OFM-A DWB OFM-P TABM-P LPTB PTB
4/9/2022
4/16/2022 0 0 1
4/23/2022 0 0 2 0
4/30/2022 0 0 2.5 0
5/7/2022 0 1 4 0
5/14/2022 1 2 0 5 0.5 0 0
5/21/2022 6 8 4 27 2 5 6 5 0
5/28/2022 34 19 3 6 13 1 23 15 0
6/4/2022 17 21 4 4 11 1 27 17 0
6/11/2022 22 25 2 1 4 0 30 9 0
6/18/2022 66 20 2 2 2 5 2 27 7 0
6/25/2022 58 21 1 8 8 2 4 22 4 0
7/2/2022 55 7 1 1 14 15 2 9 4 1
7/9/2022 60 3 1 2 8 20 2 4 5 1
7/16/2022 64 1 1 3 2 19 3 1 4 3
7/23/2022 97 1 1 2 7 18 3 1 3 3
7/31/2022 46 1 2 2 13 22 4 1 2 3
8/6/2022 26 1 1 1 5 20 3 1 4 3
8/13/2022 26 1 1 2 6 29 2 2 4 3
17 3 0 3 23 28 2 4 5 3

 

Pest Event or Growth Stage Approximate Date 2022 Observed Date
 Bud Swell (Redhaven)  March 23 +/- 15 Days March 20
1/4″ Green Tip Red Delicious March 31 +/- 13 Days March 21
Pink Peach (Redhaven) April 4 +/- 15 Days March 31
Tight Cluster Red Delicious April 9 +/- 13 Days March 31
Full Bloom Peach (Redhaven) April 9 +/- 14 Days April 10
Pink Apple (Red Delicious) April 14 +/- 12 Days April 14
Full Bloom Apple (Red Delicious) April 22 +/- 11 Days April 21
Petal Fall (Redhaven) April 22 +/- 10 Days April 14
Petal Fall (Red Delicious) April 27 +/- 13 Days May 3
Shuck Split (Redhaven) April 30 +/- 11 Days April 26
Pit Hardening June 15 +/- 9 Days June 10

 

Filed Under: Tree Fruit, Wine Grape Tagged With: , , , , , , , ,
August 18, 2022

Tree Fruit IPM Report for August 18, 2022

Peach:

Oriental Fruit Moth: A biofix point for OFM was set on 4/11 in southern counties, and on 4/14 in northern counties. The third generation timings are are over in all regions. Additional treatments should be made if trap captures are over 6 moths per trap.

Insecticide Type
County/Region Degree Days by  7/28 base 45 Conventional

2000-2100 2350-2450

 Diamide

2025–2150 2375-2450
Gloucester – Southern 2437 1st –past

2nd –Past

 1st –past

2nd –past
Middlesex – Northern 2394 1st –past

2nd –past

 1st –past

2nd –past

Scale Insects: White Peach Scale crawler emergence has ended for this generation. San Jose Scale Crawler emergence is past peak and declining. White Peach scale has a third generation in September and San Jose scale may have a third generation in October. Options at this point include: Assail, Belay (Group 4A); and the bioinsecticide Venerate. These products may provide some late season suppression where fruit damage is observed. Only Venerate has a 0 day PHI, making it useful for blocks near or at harvest.

Apples and Pears:

Diseases: Summer scab, rots and sooty blotch and fly speck are the main targets at this stage. Where scab is present rely primarily on protectant fungicides. Last year Captan plus a phosphorous acid like Prophyt was observed to slow scab development as well as provide good summer disease control. Merivon and Luna Sensation are good materials to use close to harvest. thaey are very effective for summer diseases and leave little residue.

Brown Marmorated Stink Bugs: Brown Marmorated Stink bugs are present at low to moderate levels in orchards statewide. See the NJ Tree Fruit Production guide for effective materials.

Codling Moth (CM): Timings for the second generation are updated below.  A biofix was set for CM on April 25th in southern counties, and May 6 in Northern counties (Middlesex County). Second generation treatments according to the degree day model are now over. Additional treatments should be made if trap captures are over 5 moths/trap. Some orchards have had continuing trap captures above threshold.

Codling Moth Degree Day Timing
Application and Insecticide Type
County Area Biofix Intrepid; Diamides – Altacor, Voliam mixes:

1150-1200 +

1450-1500 DD

 

 Cyd-X, Madex

1250 DD + every 7-9 days during brood hatch (later if first spray is an IGR)

 Standard Insecticides –  Delegate, Avaunt, OP’s, carbamates, pyrethroids

1250 DD +

1550-1600 DD

 
DD 1150-1200 1450-1500 1250 1250 1550-1600
Southern April 25 Past Past Past Past Past
Northern May 6 Past past Past Past Past

Scale Insects: For San Jose scale see the peach section above.

Grape

Bunch Rots: Grapes are beginning veraison in southern counties. Disease management continues to focus on downy and powdery mildew and and now also turns to bunch rot management. Refer to the NJ Commercial Grape Production Guide as well as the linked presentation from Dr. Nita in Virginia. Additional information can be found in this linked presentation from Dr. Bryan Hed at Penn Sate.

Grape Berry Moth: The timing for the third generation is past. In some hot summers a fourth generation may occur, however no further treatments should be needed, especially where insecticides are being applied for SLF.

Spotted Lantern Fly: Spotted lantern fly adults are now appearing in vineyards. At this stage border treatments with effective materials should be adequate since most adults will be found on vineyard edges and populations will be low. As we move into September adult migration will increase and at that point growers should apply materials with long residual efficacy (refer to the table from Penn Sate below.) More information on biology and control can be found from Penn State.

 

Drosophilds and Sour Rot: SWD adults are being caught in and around commercial vineyards. As the sugars start to increase in early verities like Chardonnay, be aware of Spotted Wing Drosophila combined with native fruit fly species. These populations increase at this time of year and help spread sour rot. Sour rot will only be present when you also have injured fruit. Fruit splits and various insects can help cause that initial injury. It is thought that the spotted wing drosophila (SWD), because of its saw-like ovipositor, can help cause this initial injury, helping to make the fruit more attractive to native drosophilid species.  After injury the fruit serves as a food source for ethanol-producing yeasts and acetic acid producing bacteria, the causal agents of sour rot. This in turn attracts more fruit flies to lay more eggs and spread the decay. Good canopy management for air circulation is useful to reduce sour rot incidence. However, this must be combined with insecticides and antimicrobials. A treatment regime that consists of weekly applications of an insecticide (Mustang Maxx (or other pyrethroid), Malathion, Delegate/Entrust, Verdepryn).  Add Oxidate 2.0 if fruit cracking from rain or other causes is observed. Since it is important to rotate insecticide classes when treating this often, growers should use no pyrethroid or other insecticide class more that 2 times in a row. These treatments should be started before the onset of visible sour rot and fruit fly presence.

Tree  Fruit Trap Counts – Southern Counties

Weekending STLM TABM-A CM BMSB OFM-A DWB OFM-P TABM-P LPTB PTB
4/9/2022 2 0 0
4/16/2022 0 2 3
4/23/2022 11 0 0 28 5 0 0
4/30/2022 5 0 1 31 4 0 0
5/7/2022 5 1 3 50 4 0 0
5/14/2022 8 5 3 19 2 0 0
5/21/2022 3 5 5 20 2 7 3
5/28/2022 0 19 3 13 0 11 36
6/4/2022 0 10 3 5 1 13 49 0
6/11/2022 0 9 2 6 36 0 8 47 3
6/18/2022 0 4 1 0 62 0 3 13 1
6/25/2022 16 0 0 6 3 16 0 0 18 4
7/2/2022 24 0 0 6 3 24 0 0 18 4
7/9/2022 10 4 2 15 6 31 0 0 15 3
7/16/2022 2 0 7 1 5 12 0 0 5 7
7/23/2022 15 0 5 1 2 12 0 0 14 2
7/31/2022 16 2 5 2 4 12 1 1 11 3
8/6/2022 10 0 4 0 3 31 2 0 21 4
8/13/2022 3 1 4 1 3 37 2 0 41 7

 

Tree  Fruit Trap Counts – Northern Counties

Weekending STLM TABM-A CM BMSB OFM-A DWB OFM-P TABM-P LPTB PTB
4/9/2022
4/16/2022 0 0 1
4/23/2022 0 0 2 0
4/30/2022 0 0 2.5 0
5/7/2022 0 1 4 0
5/14/2022 1 2 0 5 0.5 0 0
5/21/2022 6 8 4 27 2 5 6 5 0
5/28/2022 34 19 3 6 13 1 23 15 0
6/4/2022 17 21 4 4 11 1 27 17 0
6/11/2022 22 25 2 1 4 0 30 9 0
6/18/2022 66 20 2 2 2 5 2 27 7 0
6/25/2022 58 21 1 8 8 2 4 22 4 0
7/2/2022 55 7 1 1 14 15 2 9 4 1
7/9/2022 60 3 1 2 8 20 2 4 5 1
7/16/2022 64 1 1 3 2 19 3 1 4 3
7/23/2022 97 1 1 2 7 18 3 1 3 3
7/31/2022 46 1 2 2 13 22 4 1 2 3
8/6/2022 26 1 1 1 5 20 3 1 4 3
26 01 1 2 6 29 2 2 4 3

 

Pest Event or Growth Stage Approximate Date 2022 Observed Date
 Bud Swell (Redhaven)  March 23 +/- 15 Days March 20
1/4″ Green Tip Red Delicious March 31 +/- 13 Days March 21
Pink Peach (Redhaven) April 4 +/- 15 Days March 31
Tight Cluster Red Delicious April 9 +/- 13 Days March 31
Full Bloom Peach (Redhaven) April 9 +/- 14 Days April 10
Pink Apple (Red Delicious) April 14 +/- 12 Days April 14
Full Bloom Apple (Red Delicious) April 22 +/- 11 Days April 21
Petal Fall (Redhaven) April 22 +/- 10 Days April 14
Petal Fall (Red Delicious) April 27 +/- 13 Days May 3
Shuck Split (Redhaven) April 30 +/- 11 Days April 26
Pit Hardening June 15 +/- 9 Days June 10

 

Filed Under: Tree Fruit, Wine Grape Tagged With: , , , , , , , ,