Dave Whitmer, Agricultural Commissioner/Sealer EGVM Presentation

Dave Whitmer, Agricultural Commissioner/Sealer

EGVM Presentation


Status Report on EGVM within Napa County January 17,

2010

EUROPEAN GRAPEVINE MOTH (EGVM)

EGVM Presentation

European Grapevine Moth in Napa County

First confirmed detection: September 29, 2009

Total larval specimens Lobesia sp. positive: 30

Total larval properties Lobesia sp. positives: 23

Total adult EGVM Lobesia botrana found: 8 EGVM Presentation



EGVM Presentation


Distribution of finds


Known geographic distribution within Napa County:

Primarily Oakville/Rutherford areaZinfandel Lane, south of St. HelenaThird Avenue, east of Napa

Total detection traps deployed (10/7-26/2009):250

Number of trap servings prior to winter:3

Total adult EGVM Lobesia botrana found: 8 EGVM Presentation



EGVM Presentation


Delimitation Trapping



Life Stages


EGVM Presentation



EGVM Presentation



EGVM Presentation



EGVM Presentation



EGVM Presentation



EGVM Presentation


Botrytis Begins…


EGVM Presentation



EGVM Presentation


Almost Completely Botrytized…


EGVM Presentation


Best Way to Dispose of Infested Crop


EGVM Presentation


And in Reds…


EGVM Presentation


And in Reds…

…premature shrivel and entry holes

in berries


EGVM Presentation


A Closer Look


EGVM Presentation


A Closer Look



Potential Distribution in the U.S.


European Grapevine Moth in Napa County• What’s Happening Right Now?

– Regulatory program is being developed and will closely mirror LBAM quarantine requirements

– Determining extent of infestation through delimitation trapping (budbreak early to mid March)

– Working with USDA/CDFA to get quality information and develop strategy well before Spring

– Technical Working Group (area under quarantine, eradication, trap denisties, monitoring, degree day model, treatment, area wide mating disruption, etc.)

– Working with USDA (SITC) to identify how EGVM got to Napa County



• Challenge is developing and implementing action steps which are dependent on recommendations of Technical Working Group (TWG)

• Statewide Survey being planned for all grape growing areas in California (25 traps per sq. mi.)


European Grapevine Moth in Napa County• Growers are asked to become educated about

EGVM biology, including: – Life stages (eggs, larvae, pupae, adults)– Feeding behavior and damage on grapevines

• Flower (individual developing flowers and berries; larval nests)

• Fruit (individual berries, webbing in clusters, bunch rot)

• Become familiar with pest management strategies, monitor vineyards, regularly check for email alerts and visit County/UC website for treatment timing

• Comply with all applicable quarantine and compliance agreement requirements to prevent artificial spread and allow harvested winegrapes to be moved for processing


Documents

Dave Whitmer, Agricultural Commissioner/Sealer EGVM Presentation