File:Annual report (1938) (18243301869).jpg

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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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Fig. 8. Infestation status of the Spruce Budworm in Eastern Canad, The jack pine budworm, considered a biological race of Cacoeccia fum- iferana Clem., continues to be serious in north-western Ontario (Fig. 9). There has been a marked advance (approx. 50 miles) to the east, the spear- head of the offensive now being north of Port Arthur, Ont. The "centre of gravity" also has moved considerably eastward, since in this insect the tendency is especially marked for new infestations to become heavier than old ones. In the older areas farther west, infestation is diminishing and damage, once the outbreak bas passed over, is found to be less than was anticipated. The jack pine budworm infestation in Manitoba does not extend north of the Winnipeg River or west of Lake Winnipeg. However, there is a local- ized heavy infestation on the Fort a la Corne Forest, Sask., and the insect's activity is conspicuous east and south of Prince Albert. Budworm is found on hard pines in scattered areas in southeastern Ontario, the most notable cases being a serious infestation on jack pine at Midhurst, Ont. and an abundance on jack pine at Petawawa, Ont. The fir tortrix, Tortrix packardiana Fern., has caused light infesta- tion of planted Colorado blue and Engelmann spruce at Joliette and Berth- ier, Que., accompanied by the spruce needle-miner, Taniva albolineana Kft. The black-headed budworm, Peronea variana Fern., has been reduced to an inconspicuous position throughout eastern Canada. The position is different in British Columbia, where a fairly extensive infestation has

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Source https://www.flickr.com/photos/internetarchivebookimages/18243301869/
Author Internet Archive Book Images
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(Reusing this file)		 At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.
Volume
InfoField
1938-1943
Flickr tags
InfoField
  • bookid:annualreport19381943ento
  • bookyear:1872
  • bookdecade:1870
  • bookcentury:1800
  • bookauthor:Entomological_Society_of_Ontario
  • bookauthor:Ontario_Dept_of_Agriculture
  • booksubject:Entomological_Society_of_Ontario
  • booksubject:Insect_pests
  • booksubject:Insects
  • bookpublisher:Toronto_The_Society
  • bookcontributor:Smithsonian_Libraries
  • booksponsor:Biodiversity_Heritage_Library
  • bookleafnumber:255
  • bookcollection:biodiversity
  • BHL Collection
  • BHL Consortium
Flickr posted date
InfoField
3 June 2015

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