Codling Moth: Degree Day and Treatment Timing Predictions (Update)

Wednesday, June 15, 2022

The biofix dates for this season are May 31 for early and June 5 for late regions determined by Erika Bent, APM. Jeff Franklin, AAFC, ran the degree day model to predict when degree day thresholds will be met for treatments.


Codling Moth Treatment with Egg Hatch Products
Products: Assail, Calypso, Delegate, Confirm, Intrepid, Altacor, and Exirel
Timing: The treatment timing for egg hatch products is 100 degree days Celsius from biofix.
Prediction: According to the current forecast, the 100 degree day threshold is expected to occur by June 19 for early regions and June 22 for late regions.

Codling Moth Treatment with Organophosphate
Product: Imidan
Timing: Control of codling moth with Imidan is typically slightly later at 140 degree days after biofix.
Prediction: According to the current forecast, the 140 degree day threshold is expected to occur by June 27 for early regions and June 30 for late regions.


The models were run on Wednesday, June 15 with a degree day threshold of 10 degrees (C).

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