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How to Manage Pests
UC Pest Management Guidelines
Almond
Fruittree
Leafroller
Scientific name: Archips
argyrospila
(Reviewed 1/05,
updated 1/05)
In this Guideline:
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The fruittree leafroller overwinters in the
egg stage on limbs. Eggs hatch in early
spring. Larvae are dark green with black heads and are about 1 inch long when
fully grown; they are difficult to distinguish from obliquebanded leafroller.
Adult moths emerge in June or July
and deposit overwintering eggs. Adults appear bell shaped when at rest and have
dark brown bands running at oblique angles across their wings. The wings are
mottled with gold and white flecks. There is one generation each year.
Larvae may enter young almonds and devour the kernel. By May, the damaged nuts
are dry and collapsed with large slotlike holes. The number of nuts attacked is
usually insignificant and rarely requires control measures.
No controls are recommended.
![[UC Peer Reviewed]](/IMAGES/logo-ucpeerreviewed.jpg)
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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