Commissioner's Office conducts an enhanced vine mealybug (VMB) trapping program
of 25 traps per square mile. Countywide and regional maps are available
to growers on this web page to aid them in identifying possible VMB
infestations on their properties. Vineyard site-specific maps are also
available to growers on request.
2015 VMB maps
Full County Overview
North East Valley
North West Valley
Please note: Trapping was not conducted in Carneros in 2014 because the area is considered to be widely infested.
Historical data also available online. View Maps
Agricultural Commissioner's staff releases bio control agents, Anagyrus Wasps and Mealybug Destroyer, to help growers manage VMB populations. These releases are funded by Napa County Pest & Disease Control District funds.
Napa County UCCE Vine Mealybug Page
Winery Vine Mealybug Guidelines
UC Davis IPM