23 June 2026 - Woolly Apple Aphid Orchard Updates, Summer Diseases and Forecasts

State of the State

Phenology & DDs for NY NEWA Stations from 1/1 – 6/22

Station || Stage || DD 43F || DD 43 Forecast Through 6/28 ||

Geneva (AgriTech Crittenden) || 1434 || 1587

Highland (HVRL) || 1603 || 1769

Clifton Park || 1411 || 1571

Peru (Forrence) || 1181 || 1351

Medina (Roberts) - Inland || 1342 || 1492

Appleton North - Lake || 1181 || 1347

Fairville (The Apple Shed) - Inland || 1378 || 1529

Williamson (DeMarree) - Lake || 1294 || 1438

*all DDs Baskerville-Emin, B.E

Upcoming Pest Events (Reference: Table 7.1.4 Tree Fruit Guidelines)

ERM Sample – 2.5 mites/leaf || 1-Jun

OBLR traps set out || 1-Jun

Black stem borer – 1st flight peak || 681 ± 170 || 383 ± 122 || 1-Jun ± 9 days

RBLR – 1st flight ending || 753 ± 140 || 448 ± 105 || 2-Jun ± 8 days

American plum borer – 1st flight peak || 784 ± 183 || 457 ± 128 || 3-Jun ± 9 days

Codling moth – 1st flight peak || 768 ± 206 || 442 ± 134 || 3-Jun ± 12 days

STLM – 1st flight ending || 813 ± 128 || 475 ± 94 || 5-Jun ± 9 days

OBLR – 1st adult catch || 884 ± 90 || 523 ± 62 || 9-Jun ± 6 days

OFM – 1st flight ending || 825* ± 126* || 576 ± 97 || 12-Jun ± 8 days

Peachtree borer – 1st adult catch || 1032 ± 266 || 619 ± 182 || 15-Jun ± 11 days

San Jose scale – 1st flight ending || 1039 ± 182 || 632 ± 125 || 16-Jun ± 8 days

Black stem borer – 1st flight ending || 1056 ± 198 || 636 ± 154 || 19-Jun ± 9 days

STLM – 2nd gen. 1st adult catch || 1063 ± 91 || 648 ± 74 || 16-Jun ± 6 days

San Jose scale – 1st crawlers observed || 1124 ± 91 || 688 ± 69 || 19-Jun ± 8 days

Dogwood borer – 1st adult catch || 964 ± 230 || 571 ± 151 || 12-Jun ± 9 days

Scouting and Monitoring Resources

NY Tree Fruit Pest Monitoring Network Blog

https://blogs.cornell.edu/treefruitpests/

NY Berry Pest Monitoring Network Bloghttps://blogs.cornell.edu/berrypests/

Scouting and Monitoring Resources

Video: Apple Insect Targets and IPM Practices (including explanations of Degree Day calculations), https://youtu.be/NwyBAcvbpUs

Quick Guide for Apple Insect Pests https://help.nysipm.org/hc/en-us/articles/23290226665751-NEWA-Quick-Guide-for-Apple-Insect-Pests

Virtual Orchard Scout Training webinar recording on the Cornell IPM YouTube channel

https://www.youtube.com/watch?v=OtyOWCL1Q2A

Apple IPM Intensive Workshop playlist https://www.youtube.com/playlist?list=PLoNb8lODb49vifrm9Tla4GmAVhlIL0527

Northeast Regional Climate Change Monthly Maps

https://www.nrcc.cornell.edu/regional/monthly/monthly.html

NEWA Help Desk Frequently Asked Questions and Table of Contents. https://help.nysipm.org/hc/en-us/categories/16994462926231-NEWA-Network-for-Environment-and-Weather-Applications

https://help.nysipm.org/hc/en-us/sections/17011505301783-Apple-Insect-Disease-and-Crop-Management-Forecasts