20 May 2025

Historical Phenology and Average Degree Day Accumulation Base 43 (for reference)

Full bloom (McIntosh) || 378 ± 35 || 10-May ± 6 days

Petal fall (McIntosh) || 479 ± 42 || 18-May ± 6 days

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Phenology & DDs for NY NEWA Stations from 1/1 – 5/19

Station || Stage || DD 43F || DD 50F ||

Geneva (AgriTech North) || 10+ mm || 643 || 360

Highland (HVRL) || 10+ mm || 829 || 487

Clifton Park || Fruit set || 673 || 384

Peru (Forrence) || Petal fall || 544 || 291

Medina - Inland || Fruit set || 577 || 315

Appleton North - Lake || Fruit set || 489 || 251

Fairville (The Apple Shed) - Inland || Fruit set || 604 || 335

Williamson (DeMarree) - Lake || Fruit set || 537 || 280

*all DDs Baskerville-Emin, B.E

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Upcoming Pest Events

Pest/Phenology Event || DD Base 43˚F || Approx. Date

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Full bloom (McIntosh) || 378 ± 35 || 192 ± 25 || 10-May ± 6 days

OBLR Overwintered Gen. Sample

Codling Moth Traps set out

Lesser appleworm – 1st catch || 420 ± 144 || 217 ± 88 || 13-May ± 12 days

American plum borer – 1st catch || 457 ± 64 || 240 ± 45 || 16-May ± 7 days

OFM – 1st flight peak || 369* ± 91* || 223 ± 57 || 15-May ± 11 days

Codling moth – 1st adult catch || 475 ± 85 || 249 ± 55 || 18-May ± 7 days

San Jose scale – 1st adult catch || 533 ± 88 || 284 ± 61 || 21-May ± 8 days

Cherry fruit fly traps set out || 20-May

STLM – 1st sap-feeding mines observed || 472 ± 129 || 241 ± 76 || 18-May ± 13 days

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Petal fall (McIntosh) || 479 ± 42 || 252 ± 32 || 18-May ± 6 days

Lesser appleworm – 1st flight peak || 569 ± 205 || 313 ± 130 || 22-May ± 13 days

Plum curculio – 1st oviposition scars observed || 555 ± 77 || 286 ± 37 || 25-May ± 9 days

Pear psylla – hardshell stage observed || 569 ± 87 || 312 ± 51 || 22-May ± 9 days

Lesser peachtree borer – 1st adult catch || 570 ± 94 || 308 ± 59 || 24-May ± 8 days

San Jose scale – 1st flight peak || 644 ± 89 || 355 ± 58 || 29-May ± 8 days

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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

American plum borer – 1st flight ending || 1344 ± 144 || 856 ± 111 || 29-Jun ± 7 days

*Base temperature for OFM 45F

NY Tree Fruit Pest Monitoring Network

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

Interested in collaborating and contributing trap capture data? Contact Anna Wallis aew232@cornell.edu

Virtual Orchard Scout Training webinar

Online Course, BF224: Tree Fruit Scouting.

Weather

Northeast Regional Climate Change Monthly Maps

NOAA Climate Prediction Center (forecasts and outlooks)

NEWA and Pest Forecasting

NEWA Help Desk Frequently Asked Questions

NEWA Help Desk Apple Insect, Disease, and Crop Management Forecasts

Quick Guide for Apple Insect Pests

Apple IPM Intensive Workshop playlist:

Apple Insect Targets and IPM Practices