20 May 2025

Historical Phenology and Average Degree Day Accumulation Base 43 (for reference)Full bloom (McIntosh) || 378 ± 35 || 10-May ± 6 daysPetal fall (McIntosh) || 479 ± 42 || 18-May ± 6 days ---------------------------------------------------------------Phenology & DDs for NY NEWA Stations from 1/1 – 5/19Station || Stage || DD 43F || DD 50F ||Geneva (AgriTech North) || 10+ mm || 643 || 360Highland (HVRL) || 10+ mm || 829 || 487Clifton Park || Fruit set || 673 || 384Peru (Forrence) || Petal fall || 544 || 291Medina - Inland || Fruit set || 577 || 315Appleton North - Lake || Fruit set || 489 || 251Fairville (The Apple Shed) - Inland || Fruit set || 604 || 335Williamson (DeMarree) - Lake  || Fruit set || 537 || 280*all DDs Baskerville-Emin, B.E  ----------------------------------------------------------------Upcoming Pest EventsPest/Phenology Event || DD Base 43˚F || Approx. Date---Full bloom (McIntosh) || 378 ± 35 || 192 ± 25 || 10-May ± 6 daysOBLR Overwintered Gen. SampleCodling Moth Traps set outLesser appleworm – 1st catch || 420 ± 144 || 217 ± 88 || 13-May ± 12 daysAmerican plum borer – 1st catch || 457 ± 64 || 240 ± 45 || 16-May ± 7 daysOFM – 1st flight peak || 369* ± 91* || 223 ± 57 || 15-May ± 11 daysCodling moth – 1st adult catch || 475 ± 85 || 249 ± 55 || 18-May ± 7 daysSan Jose scale – 1st adult catch || 533 ± 88 || 284 ± 61 || 21-May ± 8 daysCherry fruit fly traps set out || 20-MaySTLM – 1st sap-feeding mines observed || 472 ± 129 || 241 ± 76 || 18-May ± 13 days---Petal fall (McIntosh) || 479 ± 42 || 252 ± 32 || 18-May ± 6 daysLesser appleworm – 1st flight peak || 569 ± 205 || 313 ± 130 || 22-May ± 13 daysPlum curculio – 1st oviposition scars observed || 555 ± 77 || 286 ± 37 || 25-May ± 9 daysPear psylla – hardshell stage observed || 569 ± 87 || 312 ± 51 || 22-May ± 9 daysLesser peachtree borer – 1st adult catch || 570 ± 94 || 308 ± 59 || 24-May ± 8 daysSan Jose scale – 1st flight peak || 644 ± 89 || 355 ± 58 || 29-May ± 8 days-----------------------------------------------------------------ERM Sample – 2.5 mites/leaf || 1-JunOBLR traps set out || 1-JunBlack stem borer – 1st flight peak || 681 ± 170 || 383 ± 122 || 1-Jun ± 9 daysRBLR – 1st flight ending || 753 ± 140 || 448 ± 105 || 2-Jun ± 8 daysAmerican plum borer – 1st flight peak || 784 ± 183 || 457 ± 128 || 3-Jun ± 9 daysCodling moth – 1st flight peak || 768 ± 206 || 442 ± 134 || 3-Jun ± 12 daysSTLM – 1st flight ending || 813 ± 128 || 475 ± 94 || 5-Jun ± 9 daysOBLR – 1st adult catch || 884 ± 90 || 523 ± 62 || 9-Jun ± 6 daysOFM – 1st flight ending || 825* ± 126* || 576 ± 97 || 12-Jun ± 8 daysPeachtree borer – 1st adult catch || 1032 ± 266 || 619 ± 182 || 15-Jun ± 11 daysSan Jose scale – 1st flight ending || 1039 ± 182 || 632 ± 125 || 16-Jun ± 8 daysBlack stem borer – 1st flight ending || 1056 ± 198 || 636 ± 154 || 19-Jun ± 9 daysSTLM – 2nd gen. 1st adult catch || 1063 ± 91 || 648 ± 74 || 16-Jun ± 6 daysSan Jose scale – 1st crawlers observed || 1124 ± 91 || 688 ± 69 || 19-Jun ± 8 daysDogwood borer – 1st adult catch || 964 ± 230 || 571 ± 151 || 12-Jun ± 9 daysAmerican plum borer – 1st flight ending || 1344 ± 144 || 856 ± 111 || 29-Jun ± 7 days *Base temperature for OFM 45F NY Tree Fruit Pest Monitoring Networkhttps://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. WeatherNortheast Regional Climate Change Monthly MapsNOAA Climate Prediction Center (forecasts and outlooks) NEWA and Pest ForecastingNEWA Help Desk Frequently Asked QuestionsNEWA Help Desk Apple Insect, Disease, and Crop Management ForecastsQuick Guide for Apple Insect Pests Apple IPM Intensive Workshop playlist: Apple Insect Targets and IPM Practices