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The UVM Apple Team

Dr. Lorraine Berkett, 

Terence Bradshaw,  Sarah Kingsley-Richards, Morgan Cromwell

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The UVM Apple Program:

Extension and Research for the commercial tree fruit grower in Vermont and beyond...

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Vermont Apple IPM Focus

  L.P.Berkett, IPM Specialist


2009 Degree Day Accumulation for Arthropod Pests

2009  Estimated Degree-Day Accumulation (Base 50F, from Jan. 1) for Selected Sites

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

East Dorset
Bennington Co.

Elev. 408 M

4/01 8 10 5 13 7
4/04 15 17 13 20 13
4/11 15 19 13 24 15
4/18 24 32 23 38 25
4/25 51 59 49 63 44
5/02 122 134 117 148 114
5/09 171 183 165 197 151
5/16 211 228 206 247 187
5/24 282 307 274 335 260
5/31 320 348 313 378 292
6/06 370 400 359 437 337
6/13 449 481 436 525 411
6/20 545 571 534 609 484
6/27 687 709 678 804 601
7/04 809 829 802 849 702
7/11 909 925 904 944 784
7/18 1015 1034 1011 1057 880
7/25 1142 1160 1138 1178 988
8/02 1316 1330 1312 1354 1142
8/09 1424 1436 1423 1468 1233
8/16 1587 1594 1588 1622 1372
8/22 1735 1743 1736 1786 1514
8/30 1855 1862 1853 1921 1623
9/07 1949 1954 1945 2016 1703
9/13 2020 2020 2016 2075 1752
9/19 2063 2065 2057 2125 1790
9/26 2130 2132 2125 2194 1845
10/02 2155 2157 2149 2223 1864
10/09 2183 2187 2176 2262 1885
10/16 2185 2187 2176 2262 1885
10/23 2192 2197 2180 2277 1895
10/31 2202 2211 2189 2291 1903

Degree Day and other weather information received from Skybit E-Weather Service: http://www.skybit.com/

2009 Guide to Arthropod Pest Events Based on Degree-Day Accumulations1

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

39-113

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

190-330

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

479-605

STLM - 2nd gen. 1st adult catch

560-740

SJS - 1st crawlers observed 619-757

OBLR - peak catch

565-827

AMF - 1st capture

750-1034

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 2009 New England Tree Fruit Management Guide


Please send comments and suggestions tolorraine.berkett@uvm.edu

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