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Ugly Nest Caterpillars - Archips cerasivorana Fitch 
Whitney Cranshaw - Colorado State University
 HOSTS: Most common on
chokecherry,
but may be found on other deciduous trees and shrubs. DESCRIPTION:
Caterpillars are olive green, reaching 3/4 inch long when mature and
found clustered in groups. LIFE CYCLE: The ugly
nest caterpillar overwinters in the egg stage on twigs. Eggs hatch in
late spring and the larvae spin a dense web around feeding sites that
become filled with their excrement and bits of leaves. Caterpillars
become full grown in 4-6 weeks and pupate around the nest. Adult moths
appear from July through September and overwintering eggs are laid in
late summer or early fall. There is one generation per year. CONTROLS: Natural
predators keep this pest at low populations. Bt is effective
on younger larvae. See Bacillus thuringiensis. |
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