Because no Oriental fruit flies have been found in Glendale for two months, county agricultural officials last week halted the emergency spraying of trees and utility poles by ground crews.
The spraying of a chemical lure and pesticide began in late September after three fruit flies were found in central Glendale from Sept. 18 to Sept. 23. Officials feared a major infestation of the flies, which are known to badly damage fruit and vegetable crops.
The treatment involved squirting a small amount of a mixture of pesticide and methyl eugenol, a chemical lure for the male fruit fly, on more than 7,600 trees and utility poles inside a 12-square-mile area in central Glendale. The treatment was repeated every other week for a total of five applications.
"The treatments are very effective. We don't expect to find any more flies," said John C. Manning, chief deputy in the Los Angeles County Agricultural Commissioner's office.