The Oriental fruit fly, a potential threat to the state's $15.5-billion agriculture industry, has infested part of the San Gabriel Valley for the second consecutive year.
An eradication effort relying on limited insecticide spraying and traps has begun in two West Covina neighborhoods where flies have been detected since mid-June.
Unlike eradication of the Mediterranean fruit fly, which can involve aerial spraying or the introduction of sterile male insects, control of the Oriental fly is relatively simple, said Gera Curry, spokeswoman for the state Department of Food and Agriculture, which oversees eradication efforts.
"We get it so often, it almost has come to be routine," said.
Curry said the "male annihilation technique" will be used, in which about 600 blobs of insecticide--scented to attract male flies--will be sprayed on trees, utility pools and street signs in the affected neighborhoods over the next two months.