Tufted Apple Budmoth Management Recommendations
Based on Degree-day (DD) Accumulations from Biofix and Percent Egg Hatch at Winchester, 2009.

Tufted apple budmoth biofix on May 20 at Winchester
Date
(2009)		 Accumulated DD from biofix
(base temperature = 45°F)		 Estimated %
egg hatch**
May 24 104 0
May 27 164 0
May 31 258 0
June 3 330 0
June 7 421 0
June 10 488 1
June 14 595 22
June 17 665 35
June 21 778 55
June 24 864 72
June 28 983 92
July 1 1060 100
July 5 1152 0
July 8 1227 0
July 12 1329 0
July 15 1408 0
July 19 1514 0
July 22 1589 0
July 26 1702 0
July 29 1791 0
August 2 1911 0
August 5 2000 0
August 9 2115 0
August 12 2214 2
August 16 2341 18
August 19 2440 31
August 23 2562 47
August 26 2652 58
August 31 2765 73
** Estimation based on Penn State tufted apple budmoth egg-hatch model

The following timing recommendations are based on complete sprays.

BLUE CELLS
Prepare for control of 1st brood larvae. Optimal timing for complete sprays of organophosphates, carbamates, pyrethroids, Altacor, Avaunt, Belt or Bt is at 530 - 585 DD, then again at 805 - 855 DD. Alternate-row-middle sprays should be initiated 50 - 75 DD earlier and be repeated at 7-day intervals. Optimal timing for a complete spray of Delegate, Intrepid or Proclaim is at 585 - 640 DD or as two alternate-row-middle sprays at 7-day intervals beginning at 530 DD. Follow with a complete spray after 14 days or alternate-row-middle sprays at 7-day intervals, depending on pressure.
RED CELLS
Prepare for control of 2nd brood larvae. Optimal timing for complete sprays of organophosphates, carbamates, pyrethroids Altacor, Belt or Bt is at 2280 - 2355 DD and again at 2665 - 2740 DD. Alternate-row-middle sprays at 7-day intervals should begin 50-75 DD earlier. Optimal timing for complete sprays of Delegate, Intrepid or Proclaim is at 2355 - 2435 DD and again at 2665 - 2740 DD. Alternate-row-middle sprays of Delegate, Intrepid or Proclaim at 7-day intervals should begin at 2280 DD.

Tree Fruit Pest Management