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The UVM Apple Team

Dr. Lorraine Berkett, Dr. Elena Garcia,  Terence Bradshaw, Jessica Reardon, Linda Boccuzzo, and Karl Zahn

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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

2000 DD Accumulation for Arthropod Pests

2000  Estimated Degree-Day Accumulation (Base 50F, from Jan. 1) for Selected Sites

Date

UVM Hort.Res.Center

Shoreham

New Haven

 Bennington

Saxtons River

Franklin

04/03

24

29

 26 27 25 14

04/12

 29

37

 32 39 35 17

04/19

 41

51

 46 52 50 26

04/23

 44

54

 49 55 52 28

04/25

 44

55

 49 56 52 28

04/29

 49

60

 54 60 54 33

05/02

 57

69

 62 67 60 39

05/03

 60

73

 65 70 63 42

05/07

 118

135

 125 124 112 89

05/09

 148

173

 160 169 152 113

05/13

 175

203

 188 195 174 132

05/15

 184

213

 197 203 181 141

05/17

 193

223

 207 212 190 150

05/21

 209

238

 222 223 202 164
05/25 242 270 254 245 220 194
05/28 260 291 274 261 239 208
05/30 275 306 289 271 249 221
06/04 337 372 353 329 307 275
06/07 351 386 367 339 317 287
06/10 377 421 396 380 357 308
06/15 414 465 437 420 391 342
06/19 479 534 505 482 454 400
06/24 564 619 590 558 531 480
06/28 649 702 672 638 611 561
07/03 736 790 759 717 693 645
07/05 770 825 793 749 727 675
07/08 799 853 821 775 755 702
07/15 914 968 935 881 864 813
07/22 1012 1070 1036 977 959 909
07/29 1139 1191 1159 1078 1059 1036
08/05 1273 1322 1287 1193 1170 1165
08/13 1426 1474 1440 1331 1311 1310
08/19 1510 1560 1525 1400 1381 1390
08/26 1599 1647 1611 1473 1456 1479
09/02 1728 1784 1744 1602 1583 1597
09/09 1795 1855 1812 1670 1647 1654
09/16 1885 1945 1903 1750 1731 1733

 

1999 Guide to Arthropod Pest Events Based on Degree-Day Accumulations1

Estimated DD Base 50 F for Event

STLM - 1st adult catch

38-116

TPB - 1st observed

43-171

ERM - egg hatch observed

100-168

STLM - 1st gen. adult peak flight

108-216

CM - 1st adult catch

182-322

STLM -1st sap-feeding mines observed

187-323

PC - 1st oviposition scars observed

249-323

OBLR - 1st adult catch, 1st summer brood

484-612

STLM - 2nd gen. 1st adult catch

558-750

OBLR - peak catch

584-850

AMF - 1st capture

741-993

STLM - 2nd gen. peak catch

876-1240

OBLR - 1st catch, 2nd summer brood

1568-1866

STLM - 3rd gen. peak catch

1822-2152

1 Source of Estimated DD (Base 50F) for arthropod pest events: 1999 Pest

Management Recommendations for Commercial Tree-Fruit Production,

Cornell Coop.Ext. Pub., Table 15., Degree-Day Accumulations are from January 1

Please send comments and suggestions to:  lorraine.berkett@uvm.edu

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