(Aug. 20, 3:16 p.m.) For the third time this year, a light brown apple moth has been trapped in Sonoma County, the heart of California’s Napa-Sonoma wine country. The discovery was made Aug. 13, said Steve Lyle, director of public affairs for the California Department of Food and Agriculture, Sacramento.

“There have been no new finds since that time,” he said.

The state agency has increased the number of traps in Sonoma County. If another moth is found within a mile of the most recent find, the agency will establish a quarantine to restrict the movement of produce and plants, Lyle said.

The apple moth, which has the potential to devastate dozens of California crops, was first discovered in California in February 2007. That discovery was in Berkeley, about 40 miles south of the wine country. Since then, hundreds of the pests have been trapped around San Francisco Bay. Most were discovered in Santa Cruz County, about 70 miles from Berkeley.

Santa Cruz County is a short distance from the vegetable growing regions of the Salinas Valley. However, none of the pests has been trapped in the more distant San Joaquin Valley, which produces the bulk of the state’s stone fruit, citrus and table grape crops.