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How to Manage Pests

UC Pest Management Guidelines

| More pests | More crops | About guidelines |

Leaffooted bug adult.

Almond

Leaffooted Bug

Scientific name: Leptoglossus clypealis

(Reviewed 1/05, updated 1/05)

In this Guideline:

DESCRIPTION OF THE PEST

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.

DAMAGE

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.

MANAGEMENT

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.
   
** For dilute applications, rate is per 100 gal water to be applied in 300-500 gal water/acre, depending on the label; for concentrate applications, use 80-100 gal water/acre, or lower if the label allows.
+ Preharvest interval. Do not apply within this many days of harvest.
* Permit required from county agricultural commissioner for purchase or use.
— Not recommended or not on label.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

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.

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Statewide IPM Program, Agriculture and Natural Resources, University of California
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