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

January 21, 1999

PD07-99

Olive Fruit Fly (OLFF)

Los Angeles County

On January 15,1999, eight OLFF were detected in Los Angeles County. OLFF larvae were found on a previous larval site. One of the OLFF was trapped in Los Angeles along Hi Point Street and it is outside the treatment area.

Cheviot Hills

Previous Larval Location

Wigtown Road - January 15 - Two third instar larvae and one pupa found in olives.

Culver City

New Trap Location

Hayden Place - January 15 - one sexually mature male OLFF found in a CHAMP trap placed in an olive tree.

Hayden Place - January 15 - one sexually mature male OLFF found in a CHAMP trap placed in an olive tree.

Los Angeles

New Trap Location

Hi Point Street - January 15 - one unmated female OLFF found in a CHAMP trap placed in an olive tree.

Wellesley Avenue - January 15 - one unmated female OLFF found in a CHAMP trap placed in an olive tree.

Westwood

New Trap Location

Loring Avenue - January 15 - one unmated female OLFF found in a CHAMP trap placed in an olive tree.

Previous Trap Location

Santa Monica Blvd. - January 15 - two sexually mature males and one unmated female OLFF found in three CHAMP traps placed in olive trees at the same location.

CDFA trappers Daniel Montoya, Juan Moreno, Maria Pareja, Ruben Perez, Jesus Razo, Ernesto Ronquillo, and Antonio Urquieta 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 256 olive fruit flies have been trapped in California. Two hundred and forty-eight 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, six OLFF have been trapped at separate sites in Alta Dena, Inglewood, Los Angeles, 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 this find.

SUMMARY - 1998-1999 OLIVE FRUIT FLY FINDS
County	Adults Trapped	Date Last Adult Trapped	Larval Properties
Los Angeles	254	01/15/1999	9
Orange	2	12/24/1998	0
Totals	256		9

Prepared by: John Pozzi