 |
- Plant Health & Pest Prevention Services
- Pest Detection/Emergency Projects
|
- DETECTION ADVISORY
|
Bactrocera facialis
Los Angeles County
La Verne
On August 4, 1998, one sexually mature male Bactrocera facialis
was found in a McPhail trap. The trap was placed in a plum tree
at a residence along 3rd Street.
The trap density at the time of the find was 5 McPhail traps
per square mile. In response, CDFA will increase the trap density
to 50 Jackson/Cue-lure traps and 25 McPhail traps per square
mile in the core square mile area around the find. The Jackson/Cue-lure
trap density in the first buffer of eight square miles will be
25 traps per square mile, with a 15-10-5 array ouside the first
buffer.
Los Angeles County trapper Todd Borgie and ID Sorter Larry Olagues
are credited with finding the fly.
CDFA Insect Biosystematists Kevin Hoffman and Eric Fisher
made the determination. Kevin Hoffman provides the following
information:
The head, wing, and thorax of Bactrocera facialis resemble
that of an Oriental fruit fly, but B. facialis differs from it
by the coloration pattern on the abdomen. Instead of the usual
T-shaped mark, the pattern consists of a single medial black
line flanked by a series of four black spots on either side,
which contrast strongly with the otherwise yellow to orange abdomen.
The size of the captured specimen is intermediate between the
typically larger Oriental fruit fly and the smaller Mediterranean
fruit fly. Males are attracted to Cue-lure, and therefore can
be found in melon fly traps. When servicing these traps, personnel
should be reminded to submit any specimens which display typical
Oriental fruit fly thorax and wing patterns, regardless of the
pattern on the abdomen.
Bactrocera facialis has the potential to become a serious
pest in any major fruit and vegetable producing country. The
hosts it attacks include avocado, bell pepper, common guava,
grapefruit, lemon, mandarin, mango, peach, pummelo, Tahiti chestnut,
breadfruit, Surinam cherry, and sweet orange. It is native to
Tonga, a group of islands near Fiji and Samoa.
|
SUMMARY - 1998 BACTROCERA FACIALIS FINDS |
|
County |
Adults Trapped |
Date Last Adult Trapped |
Larval Properties |
|
Los Angeles |
1 |
08/04/1998 |
0 |
|
Totals |
1 |
|
0 |
Prepared by: John Pozzi |