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UC IPM Home > Homes, Gardens, Landscapes, and Turf > Trees and Shrubs > Invertebrates
How to Manage Pests
Pests in Gardens and Landscapes
Pest identification and confirmation—Sawflies
How to distinguish insect larvae
Foliage-feeding sawfly species
Pear sawfly
Caliroa cerasi
Pear sawfly larvae skeletonize the leaf surface of most fruit trees and occasionally
other plants such as ash and hawthorn. Larvae are dark olive green and covered
with slime, so they look like slugs. Adults are shiny black with dark wings. |
Bristly roseslug larva
Cladius difformis |
Bristly roseslug adult
Cladius difformis |
| Bristly roseslug is one of several sluglike sawflies that feed on roses. The larvae are shiny
black to pale green and at maturity may have many bristlelike hairs on the body. |
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Conifer sawflies
Neodiprion spp.
Most conifer sawfly adults are yellowish brown to black with yellowish
legs. Pines are the most common hosts; arborvitae, cypress, fir, hemlock,
juniper, and spruce are also fed upon. Larvae are commonly yellowish
or greenish and develop dark stripes or spots as they mature. |
Mining sawfly species
Galls of willow leaf gall sawfly
Pontania pacifica
Adult males are shiny black; females are dull reddish. Females insert
eggs in leaves and inject fluid that causes the reddish galls. A larva
develops in each gall. Larvae feed mostly on or in broadleaf plants,
including alder, birch, poplar, oak, and willow. |
Raspberry horntail
Hartigla cresseni
Horntail larvae are white and cylindrical, with dark heads and a short
spine on the tail end. The adults are wood wasps with long cylindrical
bodies with a spine at the tip. The females are marked with bright yellow
and black; the males are mostly black. Tips of young shoots damaged by
horntails wilt during the spring. The tips of the cane may girdle and
wilt. The cane may suffer dieback by the summer. |
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