The light brown apple moth continues to dominate the news around California's San Francisco Bay Area. This quarantine pest has been found in nine California counties (Alameda, Contra

Costa, Marin, Monterey, Napa, San Francisco, San Mateo, Santa Clara and Santa Cruz).



LBAM, which has the scientific name Epiphyas postvittana, is a serious quarantine pest that the California Department of Food and Agriculture estimates could cause up to $133 million in crop damage if left untreated.



Since the moth was identified in February, the state has deployed 30,000 detection traps.



As of June 11, state inspectors have trapped 4,027, which most of those coming from Santa Cruz County.



Many of the trap catches were in or near wholesale and retail plant nurseries. Infested nurseries

have been sprayed with chlorpyrifos. Additional spraying will be done in selected areas with Bacillus thuringiensis (Bt).



Isomate for LBAM has received a section 18 Environmental Protection Agency registration for pheromone mating disruption.



There have been no positive identifications in commercial orchards or row crops. Pandemis

moth larvae (Pandemis pyrusana) may be confused with LBAM larvae and are quite common in local apple orchards. LBAM traps may also catch omnivorous leafroller (Platynota sultana) adult moths, which are uncommon in the Central Coast.



Photos of Pandemis moth and omnivorous leafroller larvae are available from the University of California Integrated Pest Management Guidelines Web site, located at www.ipm.ucdavis.edu. Click on the apple link.



Photos of adults and larvae are in “Integrated Pest Management for Apples & Pears” (ANR publication 3340) available from local UC Cooperative Extension offices. The CDFA web site is located atwww.cdfa.ca.gov.