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

September 3, 1998

PD52-98

Guava Fruit Fly (GFF)

San Mateo County

San Mateo

San Mateo County trapper Renald Toruno discovered a male GFF while servicing traps along Fairmont Drive. The GFF was found on September 2, 1998, in a Jackson/methyl eugenol trap placed in a pear tree.

The trap density was 5 Jackson/methyl eugenol and 5 McPhail traps per square mile. In response, San Mateo County Department of Agriculture will raise the Jackson/methyl eugenol and McPhail trap densities to 25 traps per square mile in the core square mile around the find.

CDFA Insect Biosystematist Eric Fisher made the determination.

SUMMARY - 1998 GUAVA FRUIT FLY FINDS
County	Adults Trapped	Date Last Adult Trapped	Larval Properties
Orange	1	07/08/1998	0
Los Angeles	1	07/23/1998	0
San Mateo	1	09/02/1998	0
Totals	3		0

Prepared by: John Pozzi