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Climbing Cutworms
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Mature larva of the variegated cutworm, Peridroma saucia (Hubner) |
Bertha armyworm, Mamestra configurata (Walker), feeding on apple fruit |
Life Cycle: Overwinter as eggs, larvae or pupae depending on species. Larvae can be present any time during the growing season but are most common from spring to mid-summer. One to two generations per year depending on the species.
Monitoring: Examine trees for presence of larvae or damage (chewed leaves, fruit or buds). Pheromones are available for some species. Variegated cutworm larvae feed at night and return to the soil at night. Examine the soil around base of tree for larvae if damage found. Bertha armyworms feed during the day.
Hosts: Fruit trees, ornamental trees and shrubs.
Comments: Larvae of climbing cutworms have smooth, thick bodies with somber colours (gray, brown or black) with various markings. They will typically curl up when handled. Other cutworm species recorded causing damage include the black army cutworm (Acetebia fennica [Tauscher]) and the spotted cutworm (Amathes c-nigrum [Linnaeus]).
Body length: Adult - 20.0-25.0mm; Mature larva- 30.0-40.0mm
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