The UVM Apple Team Dr. Lorraine Berkett, Terence Bradshaw, Sarah Kingsley-Richards, Morgan Cromwell |
The UVM Apple Program: Extension and Research for the commercial tree fruit grower in Vermont and beyond... |
|
The UVM Apple Team Dr. Lorraine Berkett, Terence Bradshaw, Sarah Kingsley-Richards, Morgan Cromwell |
The UVM Apple Program: Extension and Research for the commercial tree fruit grower in Vermont and beyond... |
L.P.Berkett, IPM Specialist
2008 Degree Day Accumulation for Arthropod Pests
2008 Estimated Degree-Day Accumulation (Base 50F, from Jan. 1) for Selected Sites |
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| Date | UVM HRC
South Burlington Chittenden Co. Elev. 71 M |
Shoreham Addison Co. Elev. 107 M |
South Hero Grand Isle Co. Elev. 54M |
Dummerston Windham Co. Elev. 171 M |
| 4/01 | 5 | 7 | 3 | 8 |
| 4/12 | 14 | 21 | 12 | 19 |
| 4/19 | 44 | 56 | 41 | 56 |
| 4/26 | 114 | 129 | 109 | 122 |
| 5/02 | 127 | 142 | 125 | 129 |
| 5/10 | 166 | 182 | 161 | 173 |
Degree Day and other weather information received from Skybit E-Weather Service: http://www.skybit.com/
2007 Guide to Arthropod Pest Events Based on Degree-Day Accumulations1 |
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| Pest/Phenology Event | Estimated DD Base 50 F (Jan 1) |
| Redbanded Leafroller (RBLR) - 1st catch | 32-124 |
| Rosy Apple Aphid | 56-116 |
Spotted Tentiform Leafminer (STLM) - 1st adult catch |
3 9-113 |
| STLM - 1st egg observed | 58-130 |
| Tight Cluster (McIntosh) | 84-122 |
Tarnished Plant Bug (TPB) - 1st observed |
43- 167 |
| Obliquebanded leafroller (OBLR) - 1st overwintered larvae observed | 64-160 |
European Red Mite (ERM) - egg hatch observed |
100-168 |
| Pink (McIntosh) | 125-157 |
| Oriental Fruit Moth (OFM) - 1st adult catch | 81-205 |
| STLM - 1st generation adult peak flight | 113-209 |
| Full Bloom (McIntosh) | 170-220 |
| San Jose Scale (SJS) - 1st adult catch | 186-324 |
CM - 1st adult catch |
1 90-330 |
STLM -1st sap-feeding mines observed |
165-317 |
| Petal Fall (McIntosh) | 227-283 |
Plum Curculio (PC) - 1st oviposition scars observed |
249-323 |
OBLR - 1st adult catch, 1st summer brood |
4 79-605 |
STLM - 2nd gen. 1st adult catch |
5 60-740 |
| SJS - 1st crawlers observed | 619-757 |
OBLR - peak catch |
5 65-827 |
AMF - 1st capture |
7 50-1034 |
| OFM - 2nd gen. 1st adult catch | 784-1020 |
| RBLR - 2nd gen. peak catch | 770-1070 |
STLM - 2nd gen. peak catch |
861-1217 |
| RBLR - 2nd gen. peak catch | 965-1353 |
OBLR - 1st catch, 2nd summer brood |
1528-1836 |
STLM - 3rd gen. peak catch |
1775-2121 |
1 Source of Estimated DD (Base 50F) for arthropod pest events: 2007 Pest Management Guidelines for Commercial Tree-Fruit Production. A Cornell Cooperative Extension Publication, Table 14: "Degree-day accumulations (from January 1) corresponding to selected fruit phenology and arthropod pest events." http://www.nysaes.cornell.edu/ent/treefruit/ |
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Please send comments and suggestions to: lorraine.berkett@uvm.edu
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