The Washington State Department of Agriculture has begun hanging traps for four different moths pests.

They are the European grapevine moth, light brown apple moth, silver Y moth and false codling moth, according to a news release.

But the focus will be on the European grapevine moth, which has infested the Napa Valley wine country in California.

The pest has not been found in Washington.

In Napa County, where the pest was first discovered in October 2009, nearly 100,000 have been since trapped.

The pest has shown up elsewhere in California, too, but not in as nearly as large numbers.

The larvae of European grapevine moth burrow into the berries, where they feed. They can render table grapes unmarketable.

The hole also provides an entryway for pathogens, such as Botrytis, to enter.

If left untreated, the pest can cause significant yield and quality losses.

Traps will be placed in each of the 11 major winegrape growing areas of Washington, according to the release.

They will be removed in September.