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

January 25, 1999

PD08-99

Olive Fruit Fly (OLFF)

Los Angeles County

Eight OLFF were trapped in Los Angeles County. One male OLFF was trapped on January 13, 1999, and is just outside the Los Angeles/Westwood OLFF treatment boundary. On January 21st and 22nd seven OLFF were trapped and larvae were found at two new sites. All of these OLFF finds are inside the treatment area.

Cheviot Hills

Previous Trap Location

Wigtown Road - January 22 - Two female OLFF (1 mated) were found in a CHAMP trap placed in a olive tree.

Wigtown Road - January 22 - One male OLFF was found in a McPhail trap placed in a olive tree.

Los Angeles

New Larval Location

Olin St - January 21 - one third instar larvae found in an olive tree.

New Trap Location

S. Cloverdale Avenue - January 13 - One male OLFF was found in a McPhail trap placed in a avocado tree.

West Los Angeles

New Trap Location

Selby Avenue - January 21 - two sexually mature male OLFF found in a CHAMP trap placed in an olive tree.

Previous Trap Location

Pelham Avenue - January 21 - one unmated female OLFF found in a McPhail trap placed in an olive tree.

New Larval Location

Mississippi Avenue - January 21 - two third instar larvae found in olive.

Westwood

Previous Trap Location

Selby Avenue - January 21 - one unmated female OLFF found in a CHAMP trap placed in an olive tree.

CDFA trappers Gilbert Ayala, Luis Cordova, Chris Harris, Kenny Heralal, Anthony Moreno, Maria Ramirez, Alicia Ruiz, Lupe Segura, and Adrian Vargas 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 265 olive fruit flies have been trapped in California. Two hundred and fifty-six (256) 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, seven (7) OLFF have been trapped at separate sites in Alta Dena, 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 this find.

SUMMARY - 1998-1999 OLIVE FRUIT FLY FINDS
County	Adults Trapped	Date Last Adult Trapped	Larval Properties
Los Angeles	263	01/15/1999	11
Orange	2	12/24/1998	0
Totals	265		11

Prepared by: John Pozzi