(Nov. 8) Shipping of citrus and some nonhass avocado varieties will be affected after the discovery Nov. 6 of five Mexican fruit flies in California’s San Diego County. The flies were found in two traps in residential areas of Escondido in the county’s northern growing region.

The California Department of Food and Agriculture and the U.S. Department of Agriculture have increased the number of insect traps, said Jay Van Rein, a spokesman for the state agency, and a quarantine area will be imposed once the boundaries of the infestation are determined.

Shipping of citrus products and some avocado varieties will be regulated until the infestation is eradicated. Shipping of the haas variety of avocados will not be affected, Van Rein said, because its thick skin is a barrier to hosting the pest.