Peach:
Oriental Fruit Moth: Some southern county orchards are exceeding the 8 moth per trap threshold this week. This is because trap counts and degree day accumulations indicate the start of the 3rd generation flight. These adults are starting to mate and lay eggs, which will hatch and produce the next brood. Therefor we are near the third brood insecticide timing. Please see table below:
| OFM 3rd Generation Timing | |||
| Insecticide Type | |||
| County/Region | Degree Days by 7/12base 45
(biofix – 4/8) |
Conventional
2100-2200, 2450-2500 |
Diamide
2025-2150, 2375-2450 |
| Gloucester – Southern | 1988 | 1st – 7/15-16
2nd – too far off |
1st – 7/12-13
2nd – too far off |
| Hunterdon – Northern | 1774
|
1st – about 7/23-24
2nd – too far off |
1st – about 7/20-21
2nd – too far off |
Thrips: Thrips injury has been noted in highly colored peaches and nectarines in southern counties. Delegate has a short PHI and is effective at the high rate. Lannate may work in some orchards.
Brown Rot: See last week’s newsletter and the 2021 Tree Fruit Production Guide. Also from the previous newsletter: About 10 weeks before anticipated harvest begins, use captan at 3 1/8 pounds per acre in cover sprays; at 3 weeks prior to harvest use Flint Extra at 3.8 ounces acre; and then follow the usual preharvest schedule with Fontelis at 16-20 ounces 2 weeks before harvest and Inspire Super or a propiconazole product at 1-4 days before harvest. In addition, Rhizopus rot was noted in drops in some orchards. This disease may become troublesome if conditions remain wet.
Apple:
Codling Moth (CM): On average, trap captures are low, but we have seen an increase as the second flight starts to emerge. Given how this insect can be problematic on some farms, it is very important to hit the second emergence on time. Approximate timings for the initial 2nd generation treatments are outlined below:
| Second Generation Codling Moth Degree Day Timing | ||||||
| Application and Insecticide Type | ||||||
| County Area | Biofix | Rimon, Intrepid
Diamides – Altacor, Voliam Flexi, Besiege, Exirel, Verdepryn: (150-200 DD) + 14-21 days later |
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
|
||
| DD | 1150-1200 | 1450-1500 | 1250 | 1250 | 1550-1600 | |
| Southern | April 28 | 7/2-7/4 | 7/13-15 | 7/6 | 7/6 | 7/16-7/18 |
| Northern | May 4 | 7/10-12 | 7/20-21 | 7/14 | 7/14 | 7/22-7/24 |
Tufted Apple Budmoth (TABM): Trap counts indicate that this is the end of the first generation flight. No treatments are usually needed during July, even on farms with high populations.
Summer Diseases: Rots are now appearing in susceptible varieties. Bitter rot is of most concern but white rot has also been seen in some varieties. Cover sprays with Captan at 3.5#/acre plus a phosphorus acid product (ProPhyte or similar) may help to suppress further rot infections and will improve sooty blotch and fly speck control. For troublesome blocks where bitter rot is a major concern then a tight summer disease program that incorporates Captan + ProPhyte, rotated with Merivon or Luna Sensation may improve control. Ziram (76DF) may be used at the full 6 lb/A rate (14 day PHI), and rotated with the previous suggestions. Ferbam may not be available, and is not recommended due to possible fruit marking this late in the season.
Scouting Calendar Tree Fruit Southern Counties
The following table is intended as an aid for orchard scouting. I t should not be used to time pesticide applications. Median dates for pest events and crop phenology are displayed. These dates are compiled from observations made since 1995 in Gloucester County. Events in northern New Jersey should occur 7-10 days later.
| Pest Event or Growth Stage | Approximate Date | 2021 Observed Date |
| Bud Swell (Redhaven) | March 23 +/- 15 Days | March 29 |
| 1/4″ Green Tip Red Delicious | March 31 +/- 13 Days | March 27 |
| Pink Peach (Redhaven) | April 4 +/- 15 Days | April 4 |
| Tight Cluster Red Delicious | April 9 +/- 13 Days | April 6 |
| Oriental Fruit Moth Biofix | April 9 +/- 13 Days | April 8 |
| Full Bloom Peach (Redhaven) | April 9 +/- 14 Days | April 10 |
| Pink Apple (Red Delicious) | April 14 +/- 12 Days | April 11 |
| Codling Moth Biofix | April 27 +/- 13 Days | May 2 |
| Green Peach Aphid Observed | April 16 +/- 16 Days | April 26 |
| Full Bloom Apple (Red Delicious) | April 22 +/- 11 Days | April 20 |
| Petal Fall (Redhaven) | April 22 +/- 10 Days | April 24 |
| Petal Fall (Red Delicious) | April 27 +/- 14 Days | May 7 |
| Shuck Split (Redhaven) | April 30+/- 11 Days | April 29 |
| First PC Oviposition Scars Observed | May 3 +/- 18 Days | April 29 |
| Tufted Apple Bud Moth Biofix | May 4 +/- 10 Days | May 3 |
| San Jose Scale Crawlers | June 2 +/- 8 Days | Not yet observed |
| White Peach Scale Crawlers | May 26 +/- 11 days | Not yet observed |
| Pit Hardening Peach | June 16 +/- 8 Days | June 14 |
Tree Fruit Trap Counts – Southern Counties
| Weekending | STLM | TABM-A | CM | BMSB | OFM-A | DWB | OFM-P | TABM-P | LPTB | PTB |
| 4/17/21 | 7 | 0 | 8 | 1 | ||||||
| 4/24/21 | 12 | 0 | 34 | 2 | ||||||
| 5/1/21 | 7 | 0 | 11 | 1 | 0 | 0 | ||||
| 5/8/21 | 9 | 0 | 0 | 7 | 0 | 1 | 3 | 0 | ||
| 5/15/21 | 4 | 2 | 0 | 1 | 1 | 1 | 2 | 7 | ||
| 5/22/21 | 0 | 2 | 1 | 0 | 7 | 0 | 3 | 3 | ||
| 5/29/21 | 0 | 12 | 1 | 0 | 12 | 0 | 5 | 1 | ||
| 6/05/21 | 0 | 5 | 2 | 2 | 30 | 0 | 5 | 20 | ||
| 6/12/21 | 0 | 4 | 2 | 0 | 7 | 1 | 5 | 26 | 0 | |
| 6/19/21 | 0 | 6 | 3 | 4 | 33 | 1 | 8 | 29 | 0 | |
| 6/26/21 | 0 | 2 | 2 | 1 | 34 | 0 | 2 | 18 | 2 | |
| 7/3/21 | 0 | 0 | 0 | 0 | 24 | 0 | 1 | 6 | 1 | |
| 7/10/21 | 0 | 1 | 2 | 0 | 29 | 0 | 1 | 17 | 2 |
Tree Fruit Trap Counts – Northern Counties
| Week Ending | STLM | TABM-A | CM | BMSB | OFM-A | DWB | OBLR | OFM-P | TABM-P | LPTB | PTB | |
| 4/3/21 |
|
0 | 0 | |||||||||
| 4/10/21 | 0 | 0 | 1.4 | |||||||||
| 4/17/21 | 12 | 0 | 1.6 | 0 | 1.5 | |||||||
| 4/24/21 | 14 | 0 | 9.4 | 0 | 4.4 | 0 | ||||||
| 5/1/21 | 12 | 0 | 0.2 | 21.6 | 0 | 7.7 | 0 | 0 | ||||
| 5/8/21 | 13 | 0.4 | 1.1 | 23.3 | 0 | 10.5 | 0.1 | 0 | ||||
| 5/15/21 | 12 | 0.5 | 0.4 | 12.7 | 0 | 2.7 | 0.6 | 0 | 0 | |||
| 5/22/21 | 15 | 14.3 | 2.1 | 8.0 | 0.2 | 0 | 1.3 | 8.4 | 5.8 | 0 | ||
| 5/29/21 | 3 | 30.8 | 3.1 | 5.3 | 2.1 | 7 | 5.3 | 25.3 | 20.6 | 0.2 | ||
| 6/05/21 | 2 | 27.4 | 0.5 | 6.1 | 1.4 | 0 | 3.2 | 32.7 | 7.2 | 0.5 | ||
| 6/12/21 | 18 | 26.3 | 0.4 | 5.4 | 1.7 | 2.0 | 1.6 | 37.5 | 17.9 | 0.3 | ||
| 6/19/21 | 49 | 70.4 | 1.0 | 3.1 | 2.0 | 4.0 | 5.2 | 79.5 | 10.8 | 0.2 | ||
| 6/26/21 | 64 | 30.9 | 0.5 | 4.3 | 1.4 | 0.5 | 2.9 | 35.3 | 8.1 | 0.2 | ||
| 7/03/21 | 113 | 20.6 | 0.2 | 4.6 | 4.2 | 0.5 | 1.7 | 18.1 | 7.7 | 0 | ||
| 7/10/21 | 74 | 8.2 | 0.3 | 3.0 | 3.1 | 0 | 0.9 | 7.4 | 1.9 | 0.4 |
Blueberries:
Blueberry Maggot (BBM): Blueberry maggot adults started to sporadically appear in the Hammonton area last week. Counts have been very low, but one site recorded 3 flies per trap. Most trap captures have been from traps placed in Duke fields where spraying had recently stopped. Still, growers who are exporting to Canada should be covering with a BBM effective insecticide every 7 days. If you are no longer exporting, then your management would focus on SWD.
Aphids: Aphids are still being found but are a distant secondary consideration at this time.
Spotted Wing Drosophila (SWD): Adult populations continue to provide significant pressure. As the adults continue to mate and lay eggs, higher populations of larvae will be present in dropped fruit and ultimately ripening fruit if not adequately. Stay on a 7 day schedule for any unpicked fruit. Reapplications are necessary if insecticide has been applied, only to be washed off in a thunderstorm. Make sure to target the bottom half of the bush as well as berries dropped on the ground, in addition to the tops of the plants. Adult flies are the most active during the early morning hours and at dusk. Therefore, applications of insecticide during the very early morning hours and twilight will be more effective than if applied during late morning to mid-day.
By the Numbers Summary:
| % Leafroller/Surface Lep. Injury and Plum Curculio Injured Fruit | ||||
| Week Ending | % Leps injury to Berries | % PC injury to Berries | ||
| Avg | Max | Avg | Max | |
| 5/14 | 0.13 | 2 | 0.68 | 7.8 |
| 5/21 | 0.13 | 1.8 | 0.80 | 9.8 |
| 5/28 | 0.013 | 0.5 | 0.13 | 3.7 |
| 6/4 | 0.002 | 0.2 | 0.008 | 0.3 |
| 6/11 | 0.002 | 0.3 | 0.005 | 0.4 |
| 6/18 | 0.001 | 0.2 | 0 | 0 |
| 6/25 | 0.001 | 0.1 | 0 | 0 |
| 7/2 | 0..006 | 0.2 | 0.001 | 0.1 |
| 7/9 | 0.007 | 0.1 | 0 | 0 |
| % Cranberry Fruitworm, Cherry Fruitworm and Scale Injured Fruit | ||||||
| Week Ending | % CBFW injury to Berries | % CFW injury to Berries | % Scale Injury | |||
| Avg | Max | Avg | Max | Avg | Max | |
| 6/4 | 0.009 | 0.1 | 0.005 | 0.1 | ||
| 6/11 | 0.014 | 0.6 | 0.001 | 0.1 | 0.012 | 0.9 |
| 6/18 | 0.001 | 0.1 | 0.015 | 0.7 | 0.018 | 0.4 |
| 6/25 | 0.001 | 0.1 | 0.002 | 0.2 | 0.021 | 0.9 |
| 7/2 | 0.007 | 0.4 | 0.001 | 0.1 | 0.009 | 0.3 |
| 7/9 | 0.003 | 0.2 | 0 | 0 | 0.006 | 0.3 |
| Spotted Wing Drosophila Males per Red Sticky Card | ||||
| Week Ending | SWD(AC) | SWD(BC) | ||
| Avg | Max | Avg | Max | |
| 6/4 | 1.5 | 8 | 0.375 | 3 |
| 6/11 | 1.84 | 9 | 1.77 | 1 |
| 6/18 | 3.4 | 25 | 2.86 | 6 |
| 6/25 | 5.3 | 42 | 2.87 | 9 |
| 7/2 | 7.03 | 98 | 7.36 | 22 |
| 7/9 | 22.58 | 105 | 29.73 | 77 |
| Oriental Beetle Trap Counts | ||||
| Week Ending | OB(AC) | OB(BC) | ||
| Avg | Max | Avg | Max | |
| 6/4 | 3.9 | 32 | 0.25 | 1 |
| 6/11 | 185.72 | 2025 | 15.8 | 60 |
| 6/18 | 292 | 1350 | 285 | 2025 |
| 6/25 | 1767 | 11000 | 974 | 6075 |
| 7/2 | 2813 | 13000 | 1326 | 6075 |
| 7/9 | 2214 | 11000 | 1806 | 10125 |
| Blueberry Maggot Adult Captures | ||||
| Week Ending | BBM(AC) | BBM(BC) | ||
| Avg | Max | Avg | Max | |
| 6/4 | 0 | 0 | 0 | 0 |
| 6/11 | 0 | 0 | 0 | 0 |
| 6/18 | 0 | 0 | 0 | 0 |
| 6/25 | 0 | 0 | 0 | 0 |
| 7/2 | 0 | 0 | 0 | 0 |
| 7/9 | 0.05 | 3 | 0 | 0 |
| % Diseased Fruit | ||||||
| Week Ending | % Mummy Berries | % Anthracnose Berries | % Alternaria Berries | |||
| Avg | Max | Avg | Max | Avg | Max | |
| 6/18 | 0.002 | 0.2 | 0.05 | 1.4 | 0.06 | 1 |
| 6/25 | 0.002 | 0.1 | 0.090 | 2.2 | 0.072 | 1.2 |
| 7/2 | 0.002 | 0.1 | 0.07 | 1.8 | 0.03 | 0.5 |
| 7/9 | 0 | 0 | 0.1 | 1.6 | 0.241 | 2.7 |
