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

February 2, 1999

PD09-99

Olive Fruit Fly (OLFF)

Los Angeles County

Seven OLFF were trapped between January 26 and January 29, 1999, in Los Angeles County. One male OLFF was trapped in Bel Air Estates and is just outside the Los Angeles/Westwood OLFF treatment boundary. The remainder of the OLFF finds are within the treatment area.

Bel Air Estates

New Trap Location

Nimes Road - January 29 - one sexually mature male was found in a CHAMP trap placed in an olive tree.

Cheviot Hills

Previous Trap Location

Glenbarr Avenue - January 29 - one sexually immature, unmated female found in a CHAMP trap placed in an olive tree.

New Trap Location

Glenbarr Avenue - January 29 - one sexually immature, unmated female found in a CHAMP trap placed in an olive tree.

Santa Monica

New Trap Location

Airport Avenue - January 29 - one sexually mature male and one sexually mature, mated female found in a CHAMP trap placed in an olive tree.

Westwood

Previous Trap Location

Santa Monica Boulevard - January 26 - one sexually immature, unmated female found in a CHAMP trap placed in an olive tree.

Santa Monica Boulevard - January 26 - one sexually immature, unmated female found in a CHAMP trap placed in an olive tree.

CDFA trappers Rigoberto Gomez, Chris Harris, Jesus Razo, and Ernesto Ronquillo
are credited with finding the OLFF.

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/CHAMP 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 272 olive fruit flies have been trapped in California. Two hundred and sixty-two (262) OLFF have been trapped in the Westwood area of Los Angeles and larvae have been found on 11 properties. In response, CDFA has initiated ground malathion bait to all olive trees within 200 meters of these finds. Also, eight (8) OLFF have been trapped at separate sites in Alta Dena, Bel Air Estates, Inglewood, Los Angeles(2), Manhattan Beach, Redondo Beach and West Hollywood areas. CDFA has increased trapping according to protocol around these finds.

In addition to Los Angeles County, two OLFF has been trapped in Garden Grove and Rossmoor, Orange County and CDFA has increased trapping according to protocol around these finds.

SUMMARY - 1998-1999 OLIVE FRUIT FLY FINDS
County	Adults Trapped	Date Last Adult Trapped	Larval Properties
Los Angeles	270	01/29/1999	11
Orange	2	12/24/1998	0
Totals	272		11

Prepared by: John Pozzi