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| Frederick | Rappahannock | Nelson | Botetourt | Patrick/Carroll | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Biofix date | April 10 | April 12 | April 10 | April 11 | April 11 | |||||||||
| Date (2008) | DD | % hatch | DD | % hatch | DD | % hatch | DD | % hatch | DD | % hatch | ||||
| April 15 | 52 | 2 | 36 | 1.4 | 79 | 3.2 | 52 | 2.1 | 54 | 2.2 | ||||
| April 22 | 154 | 8 | 135 | 6 | 179 | 12 | 141 | 7 | 140 | 7 | ||||
| April 29 | 264 | 29 | 249 | 25 | 301 | 39 | 254 | 26 | 256 | 27 | ||||
| May 6 | 371 | 60 | 359 | 56 | 422 | 74 | 365 | 58 | 370 | 60 | ||||
| May 13 | 454 | 82 | 447 | 80 | 518 | 91 | 463 | 84 | 490 | 88 | ||||
| May 20 | 540 | 94 | 552 | 95 | 627 | 98 | 563 | 96 | 599 | 97 | ||||
| May 27 | 656 | 99 | 671 | 100 | 754 | 100 | 682 | 100 | 734 | 100 | ||||
| June 3 | 808 | 0 | 830 | 0 | 917 | 2 | 844 | 0 | 908 | 1.5 | ||||
| June 10 | 1045 | 5 | 1064 | 7 | 1161 | 15 | 1085 | 8 | 1147 | 13 | ||||
| June 17 | 1235 | 24 | 1265 | 29 | 1370 | 49 | 1294 | 34 | 1361 | 47 | ||||
| June 24 | 1396 | 54 | 1435 | 61 | 1545 | 79 | 1462 | 66 | 1541 | 79 | ||||
| July 1 | 1593 | 85 | 1646 | 90 | 1755 | 97 | 1655 | 91 | 1739 | 96 | ||||
| Estimated percent egg hatch based on Penn State Oriental fruit moth egg-hatch model using accumulated degree days from biofix (base temperature = 45°F) | ||||||||||||||
| BLUE CELL |
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Prepare for control of 1st brood larvae. Sprays are recommended in peach blocks where >15 moths/trap/week are captured. Suggested materials: Assail or Intrepid (70 - 100 DD, then at 250 - 275 DD), Altacor, Avaunt, Delegate, organophosphates, carbamates or pyrethroids (170 - 195 DD, then at 350 - 375 DD). Hand-placed dispensers for OFM mating disruption should be deployed just prior to the onset of flight and will provide different lengths of protection, depending upon the formulation (see labels). Sprayable OFM pheromone can be applied once per generation (about every 4 weeks), just prior to the onset of moth flight. |
| RED CELL |
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Prepare for control of 2nd brood larvae. Sprays for 2nd and subsequent broods are warranted if >10 moths/trap/week are captured. Suggested materials: Assail or Intrepid (1050 - 1100 DD, then at 1350 - 1400 DD), Altacor, Avaunt, Delegate, organophosphates, carbamates or pyrethroids (1150 - 1200 DD, then at 1450 - 1500 DD). Sprayable OFM pheromone can be applied once per generation (about every 4 weeks), just prior to the onset of moth flight. |
| YELLOW CELLS |
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Prepare for control of 3rd brood larvae if >10 moths/trap/week are captured. Suggested materials: Assail or Intrepid (2000 - 2100 DD, then at 2350 - 2400 DD), Altacor, Avaunt, Delegate, organophosphates, carbamates or pyrethroids (2100 - 2200 DD, then at 2450 - 2500). Sprayable OFM pheromone can be applied once per generation (about every 4 weeks), just prior to the onset of moth flight. Preharvest intervals become an important consideration in the choice of material used to manage 3rd brood OFM in many peach varieties. |
| GREEN CELLS |
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Prepare for control of 4th brood larvae. If the trap threshold of 10 moths/trap/week is exceeded, apply a spray within 7-10 days. Note: Pre-harvest interval is a critical consideration in the choice of material used to manage 4th brood OFM in late peach varieties. |