File:Annual report (1938) (18241648788).jpg

Title: Annual report
Identifier: annualreport19381943ento (find matches)
Year: 1872 (1870s)
Authors: Entomological Society of Ontario; Ontario. Dept. of Agriculture
Subjects: Entomological Society of Ontario; Insect pests; Insects
Publisher: Toronto, The Society
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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100 THE REPORT OF THE
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F.'g. 3 Infestation status of the Larch Sawfly in Eastern Canada. Poplar leaf-folding sawfly, Pontania sp. or spp., heavily infested as- pen poplar at Timagami, Biscotasing and Sand Lake in northeastern On- tario. Leaf-roll on balsam poplar, associated with aphids, was noted from North Bay to Sault Ste-Marie, centering around Thessalon, Ont. The black-headed birch sawfly, Croesus latitarsus Nort., caused com- plete defoliation of a stand of birch near Arichat, Cape Breton Island. Pine web-spinning sawflies, Cephalcia ,spp., besides being frequent on spruce, have occurred in destructive numbers on red pine, notably at Fort Frances. Ont., and Blanche, Brennan Lake and near Berthierville, Que. Lepidoptera The spiny elm caterpillar, Nymphalis antvo.pa L., was reported defoli- ating aspen foliage at Skead, near Sudbury, Ont., shortly after it had suf- fered a moderate infestation of forest tent caterpillar. The cecropia moth, Platysamia cecropia L., has caused slight defolia- tion of Manitoba maple over an area 100 miles long in southern Saskatch- ewan (from Bengough to Hodgeville) ; the population level is very much lower, however, than during the destructive outbreak of 1931-1934. The green-striped maple worm, Anisota rubicunda Fab., has shown a sudden increase in the southern Algoma district of Ontario in 1939 (Fig. 7). Heavy defoliation of red and sugar maple is concentrated in three townships north and west of Blind River, and areas of moderate to heavy defoliation were found from Espanola to Sault Ste. Marie, and as far north as Metagama; the extensive areas of hard maple north and west of

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