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Distribution

Damage, symptoms and biology

Tolype dayi is a relatively uncommon innocuous solitary defoliator.

Mature larva up to 34 mm long. Head, grey with dark markings. Body, grey, mid-line of dorsum with dark diamond-like markings; transverse black and orange marking across dorsum of third thoracic segment; transverse black marking on dorsum of the fifth abdominal segment. Paired dorsal tubercles beset with long hairs on dorsum of each segment; hairy lobes along sides of body.

This species appears to overwinter in the egg stage. Larvae are present May to August; pupation occurs July to August and adults emerge August to September.

Canadian Forest Service Publications

Diet and feeding behaviour

Information on host(s)

Main host(s)

Photos

Dorso-lateral view of a mature larva, on a ponderosa pine