Vine Mealybug

Vine mealybug (VMB) is a serious pest found in California vineyards. VMB was first reported in Napa County in 2002. The Ag Commissioner's Office conducts a county-wide VMB trapping program of 25 traps per square mile.


VMB Map GIF

Has vine mealybug (VMB) been found near you? Access data from our 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.

You can use our guide (PDF) to help navigate through the mapping program.

  1. 1
  2. 2
  3. 3
  4. 4
  1. 1
  2. 2
  3. 3
  4. 4

Biological Control

Agricultural Commissioner's staff releases biocontrol agents, Anagyrus wasps and mealybug destroyers, to help growers manage VMB populations. These releases are funded by grower assessments managed by the Napa County Winegrape Pest and Disease Control District funds. The use of biological control is one component of an integrated pest management program that may include ant control, mating disruption, cultural practices, and the application of insecticides.