|
|
How to Manage Pests
UC Pest Management Guidelines
Almond
Leaffooted
Bug
Scientific name: Leptoglossus
clypealis
(Reviewed 1/05,
updated 1/05)
In this Guideline:
|
|
|
The leaffooted bug is an infrequent pest in almonds. It has small leaflike
enlargements on its hind legs. The narrow brown body has a yellow zigzag line
across its flattened back. It is about 1 inch long.
The leaffooted bug overwinters in or near orchards, and its presence is
apparent in late spring. Feeding on young nuts before the shell hardens can
cause the embryo to wither and abort, or may cause the nut to gum internally,
resulting in a bump or gumming on the shell. It can also cause nut drop. After
the shell hardens, leaffooted bug feeding can still cause black spots or
wrinkled, misshapen nutmeats.
Egg parasites, Gryon spp., often keep populations of leaffooted bug
below economically damaging levels. Treatment thresholds for control have not
been developed, so only apply treatment when high populations are present.
| Common name |
Amount/Acre** |
P.H.I.+ |
| (trade name) |
(conc.) |
(dilute) |
(days) |
|
|
A. |
CARBARYL* |
|
|
|
| |
(Sevin) 80S |
6 lb |
1.5 lb |
14 |
| |
COMMENTS: If carbaryl/organophosphate resistant
strains of the western predatory mite are not established, the use of carbaryl
will cause severe mite outbreaks, if pest mites are present, unless carbaryl is
used with a miticide such as propargite or fenbutatin-oxide. |
| |
|
|
|
|
| B. |
CHLORPYRIFOS* |
|
|
|
| |
(Lorsban) 4E |
2 qt |
— |
14 |
| |
COMMENTS: Do not apply more than 3
applications/season. Do not allow livestock to graze in treated orchards. Avoid
drift or tailwater runoff into surface waters. |
| |
|
UC IPM Pest Management Guidelines: Almond
UC ANR Publication 3431
Insects and Mites
F. G. Zalom, Entomology, UC Davis
C. Pickel, UC IPM Program, UC Cooperative Extension, Sutter/Yuba counties
W. J. Bentley, UC IPM Program, Kearney Agricultural Center, Parlier
R. L. Coviello, UC Cooperative Extension, Fresno Co
R. A. Van Steenwyk, Insect Biology, UC Berkeley
M. W. Freeman, UC Cooperative Extension, Fresno Co.
Acknowledgment for contributions to the insects and mites section:
R. E. Rice, Kearney Agricultural Center, Parlier
L. C. Hendricks, UC Cooperative Extension, Merced Co.
Top of page
|