Codling Moth Virus Wins DPR Approval

Insecticidal virus infects and kills larvae. Compiled by staff 

Published on: May 12, 2006

Cyd-X insecticidal virus is now registered by the state's Department of Pesticide Regulation to control codling moth larvae in apples, pears, walnuts and other tree crops in California.

Cyd-X contains a naturally occurring virus (Cydia pomonella granulovirus or CpGV) that infects and kills larvae of the codling moth. CpGV is extremely virulent to codling moth making it effective at low use rates. Studies show larvae need to only ingest one or two viral protein occlusion bodies (OBs) to cause a lethal infection. A single dose of Cyd-X contains nearly one trillion OBs. CpGV is highly specific to codling moth, so it is noninfectious to beneficial insects, fish, wildlife, livestock or humans.

Cyd-X has been registered and available to growers outside of California for three years. Rob Fritts, field development manager for Advan, the product's supplier, says, "Codling moth is the top pest species in apples and pears worldwide and is a major problem in walnuts. Codling moth has also become resistant in varying degrees to many of the insecticides we have. Cyd-X has proven to be highly effective. We've received many, many calls from growers here wondering when the product would be available in California."

Fritts also says there will be "ample" supplies of Cyd-X for California growers. Availability of the insecticidal virus has become critical over the last several years as producers have used it to forestall resistance to traditional chemistries. Once viewed as an organic-only pesticide, conventional growers have adopted this OMRI-approved product as part of their overall codling moth control strategy.

For more information about Cyd-X or Advan LLC, visit