Control strategy recommendations for the exotic European grapevine moth (EGVM) are included in a new Farm Press/Penton Media continuing education course now being offered free through the sponsorship of DuPont Crop Protection.

The course is available at westernfarmpress.com and pentonag.com and is accredited for one hour by the California Department of Pesticide Regulation. Certified Crop Adviser (CCA) credit is pending.

"DuPont welcomes the opportunity to enhance our customers’ knowledge by offering its sixth sponsored CEU course through Western Farm Press/Penton Media," says Lars Swanson, portfolio manager for Rynaxypyr products.

“EGVM is a major concern for the California grape industry and a relevant CEU course topic for pest control advisers (PCA) and growers. Our goal for sponsoring the course is to help shorten the learning curve on this newly introduced pest.”

Almost 2,000 square miles of California vineyards, orchards and farmland are under quarantine following discoveries of the pest.

The quarantines cover several areas of the premium wine grape growing region of California’s North Coast, as well as areas of Fresno and Merced counties and the Lodi area of San Joaquin County.

They will remain in effect for at least a year after the first trappings, if no other EGVM are detected. If more moths or larvae or found, quarantines could be extended.

Within these areas, as well as in adjacent grape growing areas, state and federal officials and producers are battling to control and eradicate EGVM.

All grape growing areas of the state are on high alert for the pest in order to prevent its spread.

Containment and eradication involves an aggressive control strategy recommended by University of California entomologists. Establishment of EGVM in California would have major international and domestic trading implications.

The online CEU developed by Farm Press goes into great detail about the life cycles of the moth, how to identify it, and how to control it for both conventional and organic producers.

Farm Press editors worked closely with UC entomologists in developing information for the course. DuPont field development staff also assisted in providing information and photographs.

The new CEU is available 24/7 at the two Web sites. It is accredited for all DPR licensing categories, as well as county pesticide permit holders.

 

EGVM already established worldwide

EGVM, or Lobesia botrana, is established in Southern Asia, Japan, Europe, North Africa, Anatolia, and South America.

Larvae that emerge early in the spring feed on grape bud clusters or flowers and spin webbing around them before pupating inside the web or under a rolled leaf. There are three generations per season.

Larvae of the third generation — the most damaging — feed on multiple ripening grapes and expose them to further damage from fungal development and rot. These larvae overwinter as pupae in protected areas, such as under bark, and emerge as adults the following spring.

The first discovery of the European grapevine moth in North America was in the Oakville area of California’s Napa Valley in October 2009. The first trappings yielded moths and larvae.

These discoveries prompted the California Department of Food and Agriculture and USDA Animal and Plant Health Inspection Service to initiate an aggressive statewide monitoring program to assess if the EGVM has spread to other areas of the state outside the North Coast. The trapping resulted in captures warranting quarantines in Fresno, Merced and San Joaquin counties, as well as areas near the 2009 Napa finds. One moth has been trapped in Monterey County, but no second moth that would trigger a quarantine.