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

November 6, 1998

PD86-98

Mediterranean Fruit Fly (Medfly)

Riverside County

Lakeland Village

On November 5, 1998, CDFA trapper Ken Thomas found one male Medfly in a CHAMP/yellow panel trap placed in a lemon tree along Booth Street. The find is near Medflies previously trapped in the Lake Elsinore area and is within the Lake Elsinore Medfly eradication zone (PD85-98).

Since October 22, 1998, sixty-nine (69) Medflies have been trapped at 27 separate sites in the Lake Elsinore area. Larvae have been found on four properties. CDFA initiated ground treatment with malathion bait spray to find properties and adjacents. Ground treatment of all properties within 200 meters of the finds began on October 31. Soil drench treatments with diazinon are planned for the larval properties.

The trap densities in the core square miles around the finds is 100 CHAMP/yellow panel traps and 25 McPhail traps per square mile. The trap density in the first buffer of eight square miles is 50 CHAMP/yellow panel traps per square mile, with a 25-20- 10 array of CHAMP/yellow panel traps outside the first buffer.

Sterile Medfly releases (SIT) is scheduled to begin November 6, 1998.

A quarantine area of 180 square miles has been established.

CDFA Insect Biosystematist Kevin Hoffman made the determination.

SUMMARY - 1998 MEDITERRANEAN FRUIT FLY FINDS
County	Adults Trapped	Date Last Adult Trapped	Larval Properties
Marin	1	07/14/1998	0
Orange	11	10/27/1998	1
Riverside	69	11/05/1998	4
San Diego	7	08/02/1998	0
Totals	88		5

Prepared by: John Pozzi