PARASITES OF THE YELLOWHEAD SPRUCE SAWFLY, PIKONEMA ALASKENSIS (HYMENOPTERA: TENTHREDINIDAE), IN MAINE AND NOVA SCOTIA

Author:

Thompson L. C.,Kulman H. M.

Abstract

AbstractThirteen species of parasites were reared from Pikonema alaskensis (Rohwer) larvae and cocoons collected in Maine and 12 species from larvae collected in Nova Scotia. Of the larval parasites, the most common species in Maine were the ichneumons Rhorus sp. 1 and Syndipnus rubiginosus Walley, and in Nova Scotia, the ichneumons Aderaeon bedardi (Provancher), Mesoleius sp., Rhorus sp. 2, and S. rubiginosus. Of the tachina flies, Palexorista bohemica (Mesnil) was more common in Maine, while it and Bessa harveyi (Townsend) were equally common in Nova Scotia. Only two cocoon parasites were reared in Maine, the ichneumon Endasys pubescens (Provancher) and the pteromalid Tritneptis diprionis Gahan. No egg parasites were reared. Parasitism totaled 12.3% in Maine larvae, 16.1% in Maine cocoons, and 46.7% in Nova Scotia larvae.

Publisher

Cambridge University Press (CUP)

Subject

Insect Science,Molecular Biology,Physiology,Ecology, Evolution, Behavior and Systematics,Structural Biology

Reference11 articles.

1. Forbes R. S. 1949. Observations on the biology of the yellow headed spruce sawfly, Pikonema alaskensis (Roh.) in the Maritime Provinces. M.S. Thesis, Univ. New Brunswick, Fredericton.

2. Life Tables of the Yellowheaded Spruce Sawfly, Pikonema alaskensis (Rohwer) (Hymenoptera: Tenthredinidae) in Minnesota 1

3. The Yellow-Headed Spruce Sawfly in Maine

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