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 --------------------------------------------------------------- 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 ---------------------------------------------------------------- Upcoming Pest Events Pest/Phenology Event || DD Base 43˚F || Approx. Date --- 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 --- 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 ----------------------------------------------------------------- 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 [email protected] 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