. Annual report. Alberta. Alberta Forestry, Lands and Wildlife; Forests and forestry; Public lands; Wildlife conservation; Natural resources. 1987-88 1988-89 1990-91 . 1990-91 1991-92 The spruce bu'dworm infestation increased to 141,400 ha with the largest infestation covering 120,000 ha in the Footner Lake Forest. Other infestations occurred in the Lac La Biche, Grande Prairie and Peace River forests. AFS aerially sprayed a biological insecticide () over 28,900 ha of infested stands in Footner Lake, Grande Prairie, Lac La Biche and Peace River forests. Spruce Budworm Infestations (Hectare
. Annual report. Alberta. Alberta Forestry, Lands and Wildlife; Forests and forestry; Public lands; Wildlife conservation; Natural resources. 1987-88 1988-89 1990-91 . 1990-91 1991-92 The spruce bu'dworm infestation increased to 141,400 ha with the largest infestation covering 120,000 ha in the Footner Lake Forest. Other infestations occurred in the Lac La Biche, Grande Prairie and Peace River forests. AFS aerially sprayed a biological insecticide () over 28,900 ha of infested stands in Footner Lake, Grande Prairie, Lac La Biche and Peace River forests. Spruce Budworm Infestations (Hectares) .141 400. 1987-88 1988-89 1989-90" 1990-91 1991-92 Mountain pine beetle infestations remained in the endemic stage. Movement of the beetle was closely monitored due to major outbreaks in British Columbia, adjacent to the Bow/Crow Forest. Forest Tent Caterpillar Infestations (Hectares) 2 766 000. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Alberta. Alberta Forestry, Lands and Wildlife. Edmonton, Alta. : Alberta Forestry, Lands and Wildlife
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Keywords: ., bookcentury1900, booksubjectforestsandforestry, booksubjectpubli
