Dave Whitmer, Agricultural Commissioner/Sealer
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
EUROPEAN GRAPEVINE MOTH (EGVM)
Status Report on EGVM
within Napa County
January 17, 2010
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
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:
EGVM Presentation
8
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth
in Napa County
Distribution of finds
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in Napa County
Known geographic distribution within Napa County:
Primarily Oakville/Rutherford area
Zinfandel Lane, south of St. Helena
Third 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:
EGVM Presentation
8
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in Napa County
Delimitation
Trapping
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in Napa County
Life Stages
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in Napa County
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in Napa County
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in Napa County
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in Napa County
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in Napa County
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in Napa County
Botrytis Begins…
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in Napa County
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in Napa County
Almost
Completely
Botrytized…
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in Napa County
Best Way to
Dispose of
Infested Crop
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in Napa County
And in Reds…
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in Napa County
And in Reds…
…premature shrivel and
entry holes in berries
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in Napa County
A Closer Look
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine
Moth in Napa County
A Closer Look
EGVM Presentation
Dave Whitmer, Agricultural Commissioner/Sealer
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in Napa County
Potential Distribution in the U.S.
Dave Whitmer, Agricultural Commissioner/Sealer
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
Dave Whitmer, Agricultural Commissioner/Sealer
European Grapevine Moth in 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.)
Dave Whitmer, Agricultural Commissioner/Sealer
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