Below-average temperatures through at least Tuesday of this week are resulting in a very slow accumulation of codling moth degree days from biofix. Therefore, and despite my previous prediction, the NEWA website forecasts 218 DD on Friday, May 17. Much warmer weather from Thursday onward is likely to result in the critical 250 DD for codling moth occurring early next week. This is the optimal timing for use of products such as Altacor, Delegate, Exirel, Imidan, Minecto Pro, virus, or Voliam Flexi against first generation codling moth larvae.
Until next time, best wishes. – Chris