Fruit Crops Edition

Seasonal updates on diseases, insects, weeds impacting tree fruit and small fruit (blueberry, cranberry, and wine grape). Fruit Pest Alerts are also available via this category feed.
 
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EPA Issues Final Cancellation and Termination of Uses Order for Several Chlorpyrifos Products

[EPA. August 7, 2024]. The U.S. Environmental Protection Agency (EPA) is issuing a final order terminating food processing plant (food and non-food area) uses for Chemstarr’s chlorpyrifos product “Chlorpyrifos 61.5% MUP” and food uses for Tide International’s chlorpyrifos product “Chlorpyrifos 4 EC.” EPA is also cancelling two Central Garden & Pet chlorpyrifos products “Equil Chlorpyrifos […]

EPA Issues Emergency Order to Stop Use of Pesticide Dacthal to Address Serious Health Risk

[US EPA. WASHINGTON ]– Today, Aug. 6, the U.S. Environmental Protection Agency is announcing the emergency suspension of all registrations ( i.e.,editorial note: IMMEDIATE CANCELLATION OF ALL DISTRIBUTION, SALE,  and USE) of the pesticide dimethyl tetrachloroterephthalate (DCPA or Dacthal) under the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA). This is the first time in almost […]

Tree Fruit IPM Report August 6, 2024

Peach:

Oriental Fruit Moth: A biofix point for OFM was set on 4/10 in both northern and southern counties.  All timed treatments OFM this season have past. Monitor traps and treat for counts over 6 adult moths/trap.

Tarnished Plant Bugs; and Other Catfacing Insects: Catfacing insects remain very active. Some recent fruit feeding has been observed.

Scale Insects: Second generation san jose scale and white peach scale crawlers began emergence in late July. Late season treatments include Actara (14 day PHI); Esteem (14 day PHI), Centaur (14 day PHI), Diazinon (postharvest as per label), and Venerate (2 applications 0 day PHI).

Apples and Pears:

Diseases: Summer diseases such as fruit rots (esp. Bitter rot), and sooty blotch and fly speck are the key pests at this point. Bitter rot control has been difficult at best in recent years even where management programs have been rigorous. Summer and late season fungicides for summer diseases include: Merivon, Luna Sensation, Inspire Super, Topsin-M, captan and ziram. 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 phosphite products improve control of other summer diseases such as sooty blotch and flyspeck, and may help suppress scab infections where present. Bitter rot symptoms have been appearing for several weeks in southern counties. Symptoms continue to increase in sensitive varieties.

Scale Insects: San jose scale crawlers are emerging. Actara has a 35 Day PHI at rates effective for scale on pome fruit. Belay has a 7 day phi on pome fruit. Esteem has a 45 day PHI on Pome fruit. Centaur has a 14 day PHI. Diazinon has a 21 day PHI with a 96 hour reentry.

Brown Marmorated Stink Bug: BMSB nymphs have been seen feeding in some apple and pear blocks. Effective materials include Brigade, Actara (35 Day PHI), Belay, Leverage, Mustang Max and Venerate at 2 qts.

Codling Moth (CM): The first generation codling moth timings have ended. Trap captures Continue and increased in some southern county orchards this week. A biofix was set for CM on April 17th in both northern and southern counties. All timed treatments for CM have past. Trap Captures in some southern county orchards remain above threshold. Growers with trap captures above 5 moths/trap should still use effective materials within label restrictions.

Wine Grape:

Diseases: Continue fungicides and hedging for downy mildew and powdery mildew. At veraison apply fungicides effective for bunch rots.

Spotted Wing Drosophila: SWD are now being caught on sticky traps in vineyards. Include insecticides effective for control from now until harvest.

Spotted Lantern Fly: Adult Forms are now appearing and will be moving into vineyards to feed over the next few week. No treatments are needed unless significant adult presence (> 5/vine) is seen.

 

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

Pest Event or Growth Stage Approximate Date 2024 Observed Date
 Bud Swell (Redhaven/PF-17)  March 23 +/- 15 Days March 13
1/4″ Green Tip Red Delicious March 31 +/- 13 Days March 18
Pink Peach (Redhaven/PF-17) April 4 +/- 15 Days March 18
Tight Cluster Red Delicious April 9 +/- 13 Days March 30
Full Bloom Peach (Redhaven/PF-17) April 9 +/- 14 Days April 5
Pink Apple (Red Delicious) April 14 +/- 12 Days April 9
Full Bloom Apple (Red Delicious) April 22 +/- 11 Days April 20
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 22
Pit Hardening June 15 +/- 9 Days  June 10

 

 

Tree Fruit Trap Captures – Southern Counties

STLM TABM-A CM BMSB OFM-A DWB OFM-P TABM-P LPTB PTB
3/23/2024 70 0
3/30/2024 29 0 0
4/6/2024 421 0 0
4/13/2024 415 7 1
4/20/2024 900 7 0
4/27/2024 312 2 22  1
5/4/2024 137 2 8 27 1 5
5/11/2024 6 2 15 2 1 10 42
5/18/2024 5 6 11 2 6 0 12 41
5/25/2014 33 29 7 4 25 0 44 37
6/1/2024 719 12 12 1 1 0 44 57
6/8/2024 163 7 6 0 27 0 35 52 3
6/15/2024 252 4 0 0 0 31 0 4 54 4
6/22/2024 252 4 0 0 0 31 0 4 54 4
6/29/2024 500 1 1 2 0 31 0 10 35 4
7/6/2024 245 2 5 2 1 34 0 0 27 0
7/13/2024 5 1 2 1 0 34 0 1 34 1
7/20/2024 152 5 6 3 0 19 1 1 26 0
7/27/2024 3 4 4 1 0 14 1 2 22 5
8/03/2024 12 2 3 3 1 4 0 1 21 0

Tree Fruit Trap Captures – Northern Counties

STLM TABM-A CM BMSB OFM-A DWB OFM-P TABM-P LPTB PTB AMBROSIA BEETLE
3/23/2024
3/30/2024
4/6/2024 0 0
4/13/2024 3.25 37.6
4/20/2024 11.75 93
4/27/2024 0 19 50
5/4/2024 1 16 19 124
5/11/2024 3 4 18 112
5/18/2024 4 2 1 2 2 2 83
5/25/2024 7 5 0 16 8 23 55
6/1/2024 16 7 0 28 7 21 37
6/8/2024 17 4 0 23 3 16 2 12
6/15/2024 21 2 0 21 21 27 1 12
6/22/2024 13 1 0 43 13 16 1 3
6/29/2024 15 1 0 49 13 17 1 0
7/06/2024 6 2 0 0 64 9 19 2 0
7/13/2024 2 3 3 0 38 18 18 4 0
7/20/2024 0 3 1 0 29 18 6 2 0
7/27/2024 1 3 0 0 27 16 7 2 0

Managing Cranberry Toad Bugs – August 2024

The cranberry toad bug, Phylloscelis rubra (Figure 1), is a pest of concern to cranberry growers in New Jersey. A recent study demonstrated that even relatively low densities of this insect can cause significant injury to cranberries (Rodriguez-Saona et al., 2020. “Characterizing the Feeding Injury Caused by Phylloscelis rubra (Hemiptera: Dictyopharidae) to Cranberries,” Journal of Insect Science, 20(6), 37, https://doi.org/10.1093/jisesa/ieaa143). Thus, monitoring for this insect from now through mid-August is critical.

Cranberry toad bug

Life cycle. Cranberry toad bugs feed exclusively on cranberries. This insect has a single generation per year and overwinters as eggs. Nymphs appear from the end of June through early September, while adults are present from the end of July through October (harvest). Eggs are laid from the end of August through October.

Damage. Feeding damage can be noticed in two stages. First-stage feeding damage on vines causes the leaves on new growth to close in towards the branch. Second-stage feeding results in a color change in the new growth, turning it from reddish to brown. This damage can be seen from July until harvest and will cause the branches to die and the berries to shrivel up. Heavy infestations will result in dwarfed berries.

Management. To determine infestation, lightly sweep problematic beds; the bugs should be easy to catch in sweep nets as they are very active. Currently, no threshold has been established for this pest. Therefore, insecticide applications should be based on the relative number of bugs per sweep compared with other sites and the previous history of infestation. If needed, growers can use the following control options: Sevin (broad-spectrum carbamate), Diazinon (broad-spectrum organophosphate), Danitol or Fanfare (pyrethroids), and Actara or Assail (neonicotinoid insecticides, effective against piercing-sucking insects). If infestation is high, treatments should be applied now (early through mid-August) for best control.

Autonomous straddling robot for vineyard – Public demo on August 2, 2024, in Landisville

Tree Fruit IPM Report July 24, 2024

Peach:

Oriental Fruit Moth: A biofix point for OFM was set on 4/10 in both northern and southern counties.  All Treatments OFM this season have past. Monitor traps and treat for counts over 6 adult moths/trap.

OFM 2nd Generation Timing
Insecticide Type
County/Region Degree Days by  7/24 base 45 Conventional

2100-2200

2450-2500

Intrepid/Rimon

2000-2100

2350-2450

Diamides/Virus

2025-2150

2375-2450

Gloucester – Southern 2595 1st –past

2nd – past

1st –past

2nd – past

1st –past

2nd – past

Hunterdon – Northern 2539 1st – past

2nd – past

1st – past

2nd – past

1st – past

2nd – past

Tarnished Plant Bugs; and Other Catfacing Insects: Catfacing insects remain very active. Some recent fruit feeding has been observed.

Scale Insects: Second generation san jose scale and white peach scale crawlers have begun emergence. Late season treatments include Actara (14 day PHI); Esteem (14 day PHI), Centaur (14 day PHI), Diazinon (postharvest as per label), and Venerate (2 applications 0 day PHI).

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, Inspire Super, and Aprovia may be effective, and longtime reliable broad spectrum fungicides such as omega, 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. Bitter rot symptoms have been appearing for several weeks in southern counties. Symptoms continue to increase in sensitive varieties over the past week.

Scale Insects: San jose scale crawlers are emerging. Actara has a 35 Day PHI at rates effective for scale on pome fruit. Esteem has a 45 day PHI on Pome fruit. Centaur has a 14 day PHI. Diazinon has a 21 day PHI with a 96 hour reentry.

Brwon Marmorated Stink Bug: BMSB nymphs have been seen feeding in some pear blocks. Effective materials include Brigade, Mustang Max and Venerate at 2 qts.

Codling Moth (CM): The first generation codling moth timings have ended. Trap captures Continue and increased in some southern county orchards this week. A biofix was set for CM on April 17th in both northern and southern counties. Second generation timings are updated below. Rimon is not recommended for this and later generations. Trap Captures in some southern county orchards remain above threshold. Growers with trap captures above 5 moths/trap should still use effective materials within label restrictions.

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

75-100DD + 14-17 days later

 

Intrepid

1150 + 1450 DD

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

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 DD

 

DD 1150 1450 1250 1250 1550
Southern April 22 N/A N/A past past past past past
Northern  May 1 N/A N/A past past past past past

Wine Grape:

Diseases: Powdery mildew symptoms are now appearing on clusters in some southern vineyards. Downy Mildew has been on leaves seen in some vineyards.

Grape Berry Moth: Damage from second generation berry moth is higher than normal in some southern county vineyards. Growers should check their timing using the NEWA model for the next generation. The next timing for GBM using Intrepid or diamides should be this week for southern counties.

Spotted Lantern Fly: Adult Forms are now appearing and will be moving into vineyards to feed over the next few week. No treatments are needed unless significant adult presence (> 5/vine) is seen.

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

Pest Event or Growth Stage Approximate Date 2024 Observed Date
 Bud Swell (Redhaven/PF-17)  March 23 +/- 15 Days March 13
1/4″ Green Tip Red Delicious March 31 +/- 13 Days March 18
Pink Peach (Redhaven/PF-17) April 4 +/- 15 Days March 18
Tight Cluster Red Delicious April 9 +/- 13 Days March 30
Full Bloom Peach (Redhaven/PF-17) April 9 +/- 14 Days April 5
Pink Apple (Red Delicious) April 14 +/- 12 Days April 9
Full Bloom Apple (Red Delicious) April 22 +/- 11 Days April 20
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 22
Pit Hardening June 15 +/- 9 Days  June 10

 

 

Tree Fruit Trap Captures – Southern Counties

STLM TABM-A CM BMSB OFM-A DWB OFM-P TABM-P LPTB PTB
3/23/2024 70 0
3/30/2024 29 0 0
4/6/2024 421 0 0
4/13/2024 415 7 1
4/20/2024 900 7 0
4/27/2024 312 2 22  1
5/4/2024 137 2 8 27 1 5
5/11/2024 6 2 15 2 1 10 42
5/18/2024 5 6 11 2 6 0 12 41
5/25/2014 33 29 7 4 25 0 44 37
6/1/2024 719 12 12 1 1 0 44 57
6/8/2024 163 7 6 0 27 0 35 52 3
6/15/2024 252 4 0 0 0 31 0 4 54 4
6/22/2024 252 4 0 0 0 31 0 4 54 4
6/29/2024 500 1 1 2 0 31 0 10 35 4
7/6/2024 245 2 5 2 1 34 0 0 27 0
7/13/2024 5 1 2 1 0 34 0 1 34 1
7/20/2024 152 5 6 3 0 19 1 1 26 0

Tree Fruit Trap Captures – Northern Counties

STLM TABM-A CM BMSB OFM-A DWB OFM-P TABM-P LPTB PTB AMBROSIA BEETLE
3/23/2024
3/30/2024
4/6/2024 0 0
4/13/2024 3.25 37.6
4/20/2024 11.75 93
4/27/2024 0 19 50
5/4/2024 1 16 19 124
5/11/2024 3 4 18 112
5/18/2024 4 2 1 2 2 2 83
5/25/2024 7 5 0 16 8 23 55
6/1/2024 16 7 0 28 7 21 37
6/8/2024 17 4 0 23 3 16 2 12
6/15/2024 21 2 0 21 21 27 1 12
6/22/2024 13 1 0 43 13 16 1 3
6/29/2024 15 1 0 49 13 17 1 0
7/06/2024 6 2 0 0 64 9 19 2 0
7/13/2024 2 3 3 0 38 18 18 4 0
7/20/2024 0 3 1 0 29 18 6 2 0