European Grapevine Moth

UC Treatment Guidelines for the 1st generation of 2012 are now available on the UC Cooperative Extension, Napa County website.

Also, if you missed the Industry meetings in Napa County this week, my presentation is also available.

The Technical Working Group for Lobesia botrana has released their report, from meetings held Dec 13-15, 2011 in Sacramento, CA.

The report provides recommendations for regulatory policy and management practices for Lobesia botrana in California. Staff of USDA and CDFA use these recommendations to develop regulatory policy.

The Ag Commissioner's office will be holding three meetings to address the EGVM program in Napa County for 2012. The format will be identical for each meeting, so you need plan to attend only one. BUT, YOU SHOULD PLAN TO ATTEND, or send a representative, to learn about the recommended treatment program for 2012.

Yountville Community Center on Tuesday, Feb 14, 10 am to noon.
Tucker Farm Center (Calistoga) on Wednesday, Feb 15, 10 am to noon
Rutherford Grange on Thursday, Feb 16, 2 pm to 4 pm

Pre-registration is not required, but any questions regarding the meeting should be directed to the Ag Commissioner's office: 707-253-4357.

CDFA crews will be working in the RESIDENTIAL AREAS of Napa and American Canyon. They will not be working in any commercial vineyards. They will be removing mating disruption dispensers. They plan to start work on November 7, and hopefully finish by November 23. There will be seven 3-person teams removing the dispensers.

Questions? Please contact John Cooledge, in the Ag Commissioner's office:   (707) 253-4357 or john.cooledge@countyofnapa.org

We caught one male today (9-September) in a Napa County vineyard trap. This is a male of the 3rd flight that was forecasted to start at the end of August in Napa.  

Any moths trapped after 2350 degree-days Fahrenheit (DDF) are considered moths of the 3rd flight. As of August 28, we had accumulated 2367 DDF in Oakville (Oakville CIMIS station data).

Treatments for the 3rd generation were not recommended by the Technical Working Group, except in the case of obvious damage or populations. 

USDA-APHIS, CDFA, and California Agricultural Commissioners released a Situation Report on Lobesia botrana on August 27, 2011.

2011 catches in Napa County detection traps, by month:
April: 31 males
May: 60 males
June: 0 males
July: 15 males
Aug: 1 male

The Napa County Agricultural Commissioner and Staff have issued a progress report on EGVM activities in Napa. 

The report contains critical information on Compliance Agreements for the movement of fruit both within California and out-of-state. You must have an active compliance agreement to move or receive fruit grown in a quarantined area. Compliance agreements from 2010 are still in effect, unless you received an updated exhibit from the Agricultural Commissioner's office.

There are unique requirements for fruit moving out-of-state from the quarantined area. These are detailed in the newsletter file.

If you have any question on Compliance Agreements or fruit movement, please contact the staff of the Agricultural Commissioner: 253-4357

USDA-APHIS, CDFA, and California Agricultural Commissioners have released a "Situation Report for Lobesia botrana in California" as of July 16, 2011.

The report contains the most current detection trapping results, by California county, as well as the number of detection traps deployed per California county.

It also reports the most current information on fruit removal and other treatments in residential areas, and general information on quarantined areas.

Link to the newsletter below to access the full text of the report.

No male moths caught in our UC traps this week. Males were caught in the the County-wide detection traps serviced by staff of the Napa County Ag Commissioner this week. Thus, the second flight continues in Napa.

Although we have not detected any eggs or larvae of the 2nd generation, we continue to project that peak flight and peak egg laying occured last week in Napa County. We are basing this on calculations using development models and field verification of populations during the 1st generation in Napa.  

Growers using conventional materials should have already made spray applications in Napa County, and growers using organic materials should have made their second and final treatments for this generation this week.

California Department of Food and Agriculture (CDFA) crews will be working in the city of Napa this week. They are doing some ground verification planning for additional mating disruption activities that will occur in the next few weeks.
CDFA crews will also be working in the Carneros and Foster Road areas this week (July 12-15). They will be doing a 2nd round of fruit removal on non-commercial (mainly backyard) vines, only when owners have chosen not to treat with insecticides or harvest fruit.

Should you have any question about these activities, please contact the office of the Agricultural Commissioner of Napa County: (707) 253-4357.

If you have specific questions following an encounter with a member of a CDFA crew, please make note of the CDFA crew member's name. All crew members should be wearing their name badges. Having the name of the person you spoke with will  greatly increase the chances that staff of the Ag Commissioner can track down the information that you seek.