Vine Mealybug


Agricultural Commissioner Sealer of Weights and Measures

Greg Clark, Agricultural Commissioner Sealer of Weights and Measures

Vine Mealybug

 generic map

Has vine mealybug (VMB) been found near you?  Access data from this interactive map to find out.   Each square represents a 25-acre area and are colored relative to the range of VMB males trapped.  The map is searchable by APN, address or operator identification / permit number.  Contact our office if you have questions about the map.  

Check the mapping application to find out and use this guide to help navigate through the mapping program


The Ag 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



Soda Canyon 

Deer Park 

South Napa 

Mid Valley 

St Helena

North East Valley

 Wooden 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


 Biological Control 

 VMB KillersAgricultural 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. 


Related Information:  

Napa County UCCE Vine Mealybug Page

Winery Vine Mealybug Guidelines

UC Davis IPM