2020 Apple Codling Moth, First Generation

2020 Apple Codling Moth, First Generation

Landscape & Garden    Treasure Valley

Codling Moth (Cydia pomonella)

Posted on: May 8, 2020 by Nic Usabel

The first apple codling moths were trapped at the end of April (Biofix on April 25). Currently the degree day model is reporting 131 degree days (DD) as of May 7. There are different management options to consider when controlling this pest.

Option A: Starting at 200 DD, forecasted to be May 11, apply a mixture of water and horticultural oil at 1% concentration to smother egg infestation. Follow with first application of insecticide at 350 DD. Reapply insecticides based on the protection interval stated on the label.

Option B: Starting at 220-250 DD, forecasted to be May 14, apply insecticides that target newly hatched larvae. Reapply insecticides based on the protection interval stated on the label.

Reference publication links to view insecticide options for commercial or residential sites. Commercial products with the active ingredients including; spinetoram, acetamiprid, chlorantraniliprole, etc. Residential products with active ingredients including; lambda-cyhalothrin (restricted use pesticide), or esfenvalerate and Spinosad (general-use pesticides). Non-spray option is to bag the fruit.

This pest needs prevention all season long for clean fruit.

» https://pnwhandbooks.org/insect/tree-fruit/apple/apple-codling-moth

» https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1879&context=extension_curall

» https://extension.colostate.edu/topic-areas/insects/codling-moth-control-in-home-plantings-5-613/