The codling moth biofix dates for this season are June 13 for most regions and June 15 for late regions determined by Erika Bent, APM.
Suzanne Blatt, AAFC, has run the degree day model today to predict when degree day thresholds will be met for treatments. The models were run on Monday, June 29 with a degree day threshold of 10 degrees (C) using Kentville weather station data.Codling Moth Treatment with Egg Hatch Products
Products: Assail, Delegate, Intrepid, Altacor, and Exirel
Timing: The treatment timing for egg hatch products is 100 degree days Celsius from biofix.
Products: Assail, Delegate, Intrepid, Altacor, and Exirel
Timing: The treatment timing for egg hatch products is 100 degree days Celsius from biofix.
Prediction: The 100 degree day threshold was reached in early regions by June 27. Late regions reached the threshold on June 28.
Product: Imidan
Caution: All hand thinning activities must be completed prior to application. No hand thinning can occur on trees treated with Imidan.
Timing: Control of codling moth with Imidan is typically slightly later at 140 degree days after biofix.
Timing: Control of codling moth with Imidan is typically slightly later at 140 degree days after biofix.
Prediction: The 140 degree day threshold is expected in early regions by end of day July 1. Late regions by end of day July 2.
Recommendations:
- Monitor the forecast for rain and do not apply treatment before heavy rain. Codling moth lay eggs that hatch over a period of time. Late application may miss the first egg hatch and could result in a few codling moth entries but will still provide residual activity for future egg hatches.
- If trap captures are below the treatment threshold but continue to build over time then treatment should be applied once a threshold is reached.
