Spruce Budworms Handbook: Predators of the Spruce BudwormU.S. Department of Agriculture, Forest Service, Cooperative State Research Service, 1985 - 77 pages Set includes revised editions of some issues. |
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Page 8
... Green River Watershed , Neilson ( 1963 ) noted that mite populations showed numerical responses to egg densities over the entire range of den- sities studied . He concluded that these numerical responses may partially ex- plain the ...
... Green River Watershed , Neilson ( 1963 ) noted that mite populations showed numerical responses to egg densities over the entire range of den- sities studied . He concluded that these numerical responses may partially ex- plain the ...
Page 14
... Green River Watershed , New Brunswick , F. C. Hirtle observed several species of spiders preying on both budworm larvae and eggs ( Morris 1948 ) . The species were not identified , but populations averaged 20 per mature balsam fir tree ...
... Green River Watershed , New Brunswick , F. C. Hirtle observed several species of spiders preying on both budworm larvae and eggs ( Morris 1948 ) . The species were not identified , but populations averaged 20 per mature balsam fir tree ...
Page 19
... Green River Watershed , New Brunswick , data were collected on bird consumption of spruce bud- worms ( Mook 1963 ) . Of the total budworms eaten , fewer than 1 per- cent were in the fourth instar or smaller . In Maine , we collected two ...
... Green River Watershed , New Brunswick , data were collected on bird consumption of spruce bud- worms ( Mook 1963 ) . Of the total budworms eaten , fewer than 1 per- cent were in the fourth instar or smaller . In Maine , we collected two ...
Page 20
... Green River Watershed in New Brunswick . Using serological tech- niques , they estimated that 20 percent of the foliage - collected spiders gave positive tests when the budworm population was high ; only 8 percent gave positive tests ...
... Green River Watershed in New Brunswick . Using serological tech- niques , they estimated that 20 percent of the foliage - collected spiders gave positive tests when the budworm population was high ; only 8 percent gave positive tests ...
Page 26
... Green River Watershed , New Brunswick . More recently , Finnegan ( 1978 ) and McNeil et al . ( 1978 ) have shown that the introduced red wood ant is an effective predator of the spruce bud- worm in Quebec . Lab tests showed that this ...
... Green River Watershed , New Brunswick . More recently , Finnegan ( 1978 ) and McNeil et al . ( 1978 ) have shown that the introduced red wood ant is an effective predator of the spruce bud- worm in Quebec . Lab tests showed that this ...
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Common terms and phrases
abundant adults arthropods attack balsam fir Biology Borror Brunswick Buckner Canadian Entomologist Canadian Forestry Service carabid carabid beetles Choristoneura fumiferana coccinellid Coccinellidae concluded Crawford defoliators dispersal dragonflies dynamics of epidemic eastern egg masses endemic endemic populations Entomological Society epidemic spruce budworm estimated eumenid eumenid wasps Finnegan foliage worm Forest Insect forest pests Fredericton ft² Green River Green River Watershed ground beetles habitats hibernacula host trees Hymenoptera important predators insects instars large larvae Lepidoptera leucomelas Loughton mammals Miller mites Morris mortality nests North northeastern spruce-fir forests northern Maine numerical responses observed Odonata Ontario Opiliones parasites percent potential predators predators of large predators of spruce predatory preying on spruce pupae pupal red squirrels serological small larvae Society of Canada species undetermined spiders spruce bud spruce budworm eggs spruce budworm larvae spruce budworm moths spruce budworm populations spruce budworm pupae spruce foliage strip clearcut studies susceptible techniques tion Varty warblers wasps worm larvae