RBLR = Redbanded leafroller; STLM = Spotted tentiform leafminer; OFM = Oriental fruit moth; CM = Codling moth; TABM = Tufted apple bud moth; DWB = Dogwood borer; LPTB = Lesser peach tree borer; PTB = Peach tree borer; AM = Apple maggot (in a commercial orchard in Kearneysville).

Degree Days and Estimated Egg Hatch - WVU Kearneysville Tree Fruit Research and Education Center

^*First sustained pheromone trap capture.

**Based on SkyBit predictions.

¹Base temperature of 45°F, upper temperature of 90°F. Control of the fourth generation is justified where the pheromone trap capture exceeds 10 moths/trap/week in both peach and apple. Initiate insecticide applications about 7 days after exceeding this threshold and maintain spray intervals on a 2 week (complete, preferred) or 5-7 day (alternatte-row-middle) schedule for as long as this condition continues.  Control options in peach [days to harvest] include Delegate [14, 1 on nectarine], Imidan [14], Ambush [14], Asana [14], Pounce [14], Proaxis [14], Warrior [14], Altacor [10], Assail [7], Intrepid [7], Baythroid [7], Lannate [4, 1 on nectarine], and carbaryl (Sevin) [3]. Control options in apple include Calypso [30], Asana [21], Battalion [21], Decis [21], Proaxis [21], Warrior [21], Altacor [14], Azinphos-methyl (Guthion) [14], Intrepid [14], Avaunt [14], Danitol [14], Rimon [14], Assail [7], Baythroid [7], Delegate [7], and Imidan [7]. In addition, CheckMate OFM-F sprayable pheromone [0] may be applied in both apple and peach to provide up to 4 weeks of adult control through mating disruption.

²Base temperature of 50°F, upper temperature of 88°F. Control of the third generation is justified where the pheromone trap capture exceeds 5 moths/trap/week. Spray timing for control, based on degree day (DD) accumulations after biofix, depends on the material selected. If using Rimon, Intrepid, Assail, Calypso, Cyd-X or Carpovirusine, initiate control at 2160 DD after biofix (1% egg hatch). If using Altacor, Delegate, Avaunt, Azinphos-methyl (Guthion), Imidan or pyrethroids, initiate control at 2260 DD after biofix (5% egg hatch). An initial spray of any material should be followed by a second complete application (preferred) in about 10-14 days (7-10 days for Cyd-X or Carpovirusine), or up to three additional alternate-row-middle applications 5-7 days apart (3-5 days apart for Cyd-X or Carpovirusine), if needed based on pheromone trap capture, proximity to harvest, and warm night temperatures that favor continued mating and egg-laying.

³Base temperature of 45°F, upper temperature of 91°F. The most effective materials for control include Intrepid, Proclaim, Rimon, Delegate, Altacor, and SpinTor. For control of the second generation, one of these products should be applied as two complete sprays at 2355-2435 DD after biofix (20-30% egg hatch) and 2665-2740 DD (60-70% egg hatch), or as four alternate-row-middle applications, 7 days apart, beginning at 2280 DD (10% egg hatch). For all other materials [BT, or Azinphos-methyl (Guthion) or Imidan in combination with Lannate], control the second generation with two complete applications at 2280-2355 DD (10-20% egg hatch) and 2665-2740 DD (60-70% egg hatch), or four alternate-row-middle applications, 7 days apart, beginning at 2210 DD (1% egg hatch).