Plant Health & Pest Prevention Services Pest Detection/Emergency Projects
DETECTION ADVISORY

December 17, 1998

PD111-98

Olive Fruit Fly (OLFF)

Los Angeles County

Twenty-nine OLFF were trapped December 14-16, 1998, in Los Angeles County. OLFF was found for the first time in Inglewood. The remainder of the OLFF were trapped at or near previous find sites.

Inglewood

New Trap Location

Century Blvd - December 14 - one sexually mature male found in a McPhail trap placed in an orange tree.

The Inglewood find is approximately eight miles south from the Westwood area finds.

Westwood

New Trap Locations

Selby Avenue - December 16 - three sexually mature males found in a McPhail trap placed in an olive tree.

Glendon Avenue - December 15 - one sexually mature male found in a McPhail trap placed in an olive tree.

Previous Trap Locations

Santa Monica Blvd - December 15 - one mated female, nine unmated females, eight sexually mature males, and one sexually immature male olive fruit flies trapped at five trap sites on same property. OLFF found in McPhail and AM pherocon traps.

Eastborne Avenue - December 16 - one unmated female, one sexually mature male and one sexually immature male olive fruit flies trapped at two trap sites on same property. OLFF found in McPhail and AM pherocon traps.

West Los Angeles

Previous Trap Location

Pelham Avenue - December 16 - one sexually immature male and one unmated female OLFF trapped at two sites on same property. OLFF were found in McPhail and AM pherocon traps

CDFA trappers Luis Cordova, Ernesto Ronquillo, Los Angeles County trapper Nelson Dominguez and Federal I.D. sorter Dorinda Singer are credited with finding the flies.

CDFA Insect Biosystematist Kevin Hoffman made the determinations.

Olive fruit fly does not respond to cuelure or methyl eugenol. CDFA has increase the McPhail trap density, as needed, to 80 traps per square mile in the core square mile and 40 McPhail traps per square mile in the eight adjacent square miles. In addition, AM panel traps have been deployed at the same density as the McPhail traps within the delimitation trapping area. CDFA is continuing a larval survey on find properties and their adjacents.

Since October 19, 1998, a total of 63 olive fruit flies have been trapped in California. Sixty OLFF have been trapped in the Westwood area of Los Angeles and larvae have been found on nine properties. In response, CDFA has initiated ground malathion bait to all olive trees within 200 meters of these finds. Also, two OLFF have been trapped at separate sites in Manhattan Beach and Inglewood, Los Angeles County. CDFA has increased trapping according to protocol around both of these finds.

In addition to Los Angeles County, one OLFF has been trapped in Garden Grove, Orange County and CDFA has increased trapping according to protocol around this find.

SUMMARY - 1998 OLIVE FRUIT FLY FINDS
County	Adults Trapped	Date Last Adult Trapped	Larval Properties
Los Angeles	62	12/16/1998	9
Orange	1	12/02/1998	0
Totals	63		9

Prepared by: John Pozzi