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Sawflies on ornamentals
There are a number of sawflies on ornamental plants.
This year we have had reports of pear slug, Caliroa cerasi (L.)
on hawthorn. Other host material for this sawfly includes cherry, mountain
ash, pear, prune, and quince. The first brood of larvae is most abundant
during June and July. The larvae of the second generation occurs in August
and September.
OSU Fact
sheet on pearslug
WSU
Fact sheet onpear slug
UC Pest Management
Guidelines: Pearslug
Another sawfly has been found this season on birch.
Identified as a Caliroa species, I've included pictures of the
larva and damage sent in by Todd Murray.
References:
Berry, Ralph. 1998. Insects and Mites of Economic Importance in the Pacific
Northwest, 2nd Ed. OSU Bookstore, Inc. Corvallis, OR, USA. 221 pp.
Schuh, J. and D.C. Mote. 1948. Insect Pests of Nursery
and Ornamental Trees and Shrubs in Oregon. Station Bulletin 449. Agricultural
Experiment Station, Oregon State College, Corvallis, OR, USA. 164 pp.
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