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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98 THE REPORT OF THE
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Fig. 2 Kncwn distribution and infestation status of the European Spuce Sawfly The red pine sawfly {Neodiprion sp. undescr.) has become extremely abundant on red pine in Co. Temiscamingue> Que. and around Biscotasing, Ont., and throughout northwestern Ontario from Quetico Park west into southeastern Manitoba; defoliation may be as much as 10-25 per cent. The form on jack pine, probably the same species, has been very active through- out eastern Algoma, areas near Biscotasing and Chapleau often experienc- ing 50 % defoliation; jack pine was also stripped at Minaki in northwestern Ontario. This species has been evident only in the last three years, steadily increasing to 1939. The red-leafed jack pine sawfly, Neodiprion dubiosus Schedl, is even less conspicuous than in 1938. Small infestations have been spotted at Kirk and Glendale, Ont., and L'Ascension, Que., while it is abundant east of Prince Albert, Sask. However, in most areas it has become quite rare. The same may well be said of Swaine's pine sawfly, Neodiprion swainei Midd. The black-headed jack pine sawfly, Neodiprion nanulus Schedl, caused very heavy local infestations at Spencerville, Ont., Quyon, Que., and Farlane in northwestern Ontario. The hemlock sawfly, Neodiprion tsugae Midd., has decreased in num- bers at Trinity Valley, B.C., scene of an outbreak last year. The lodgepole sawfly, Neodiprion sp., occurred throughout British Columbia and was locally abundant at Trinity Valley. The arbor-vitae sawfly, Monoctenns juniperinus MacG., has been found throughout southeastern Ontario, northward to Timmins and east- ward to Co. Rimouski, Que. This species was plentiful on a white cedar hedge at Epsanola, Ont. The birch sawfly, Arge pectoralis Leach, has' frequently damaged birch in eastern Ontario and western Quebec; Brent, Arnprior, Bells Corners, Spencerville, Roebuck. Ont., and1 Danford Lake,, St. Michel

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