Codling Moth Granulosis Virus: How CpGV Works

Codling moth granulosis virus, commonly abbreviated CpGV, is a baculovirus used in certain registered biological insecticides for codling moth larvae. This page focuses on how that active ingredient works and why timing and label compliance determine whether a product is appropriate.

How CpGV affects codling moth larvae

Larvae must ingest virus particles from a treated surface. Infection then develops within susceptible larvae. Because newly hatched larvae soon enter fruit or nuts, exposed surface-feeding time can be brief.

Timing begins with monitoring

Use pheromone traps to detect adult flight and consult a local degree-day model or Cooperative Extension guidance to estimate egg hatch. Calendar dates and a universal degree-day number are unreliable across climates, generations, trap types, and model systems.

The registered product label controls

“Naturally occurring” does not remove the need to follow the pesticide label. Confirm that the product is currently registered for the crop and target pest, then follow its directions for rate, coverage, timing, repeat applications, storage, protective equipment, harvest interval, and environmental precautions.

Organic eligibility also belongs to the specific product and use—not to CpGV as a blanket claim. Certified operations should confirm current input approval with their certifier.

Use CpGV within an integrated plan

Combine monitoring and any justified treatment with prompt removal of infested fruit, post-harvest sanitation, and fruit barriers where practical. Resistance management and rotation instructions on the label are especially important when repeated generations require treatment.

For the complete strategy, see Organic Control of Codling Moths. For generation timing, read Understanding Codling Moth Generations.

Compare codling moth monitoring and control products.