Saltmarsh Caterpillar
Estigmene acrea
Saltmarsh caterpillar larva.
Saltmarsh caterpillar larva and associated damage on hemp.
Saltmarsh caterpillar larva.
Saltmarsh caterpillar adult.
Mating saltmarsh caterpillar adults.
Saltmarsh caterpillar eggs.
Hosts
- Hemp
- Various vegetable crops
- Various weeds
Description
Larvae are densely-haired “woolly bear” caterpillars that range in coloration from yellow to orange to black and potentially with striping. Adults are moderate-sized moths with spotting on the wings and color ranging from white to black to yellow to orange.
Life Cycle
Egg | Larva | Pupa | Adult
- 2-3 generations per growing season.
- Overwinter as full-grown larvae within cocoons amongst soil debris.
Damaging Lifestage(s): Larva
Damage Symptoms
Larvae feed on leaves with chewing mouthparts, causing skeletonized foliage, irregular holes, shredded leaves, or defoliation.
Time for Concern
Late summer and early autumn.
When and Where to Scout
Look on leaves for eggs and larvae starting in late July.
Threat Level
Very low.
Occurrence in Utah
This insect occurs in Utah, but has not been identified as a pest in Utah hemp. It has been seen damaging hemp in neighboring states.
Management
- Keep crop area weed-free.
- Hand-pick and destroy larvae.
When to Consider Treatment
If there is a high population of moths and the signs of damage are seen consistently.
Look-alikes
Yellow woollybear caterpillar
Photo Credits
- Larva - Alton N. Sparks Jr., University of Georgia, Bugwood.org
- Eggs/Larva/Damage - Whitney Cranshaw, Colorado State University, Bugwood.org
- Adults - Megan McCarty, Wikipedia