| Sugar pine tortrix larva with ivory colored spots, easily confused with western spruce budworm. |
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| But an insect, the spruce budworm, has its own dynamic, periodically exploding in population, denuding trees, competing directly with the industry. |
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| A suppressive, subtractive hybridization procedure was applied to dissected midguts of the budworm exposed to sub-lethal levels of the toxin. |
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| These birds crowd into budworm infested areas to breed and raise young, then move elsewhere when the infestation declines. |
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| In the southeastern boreal forest, large canopy openings caused by spruce budworm outbreaks may lead to a cyclical replacement of mature stands of balsam fir. |
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| The fishing industry of Canada has become alarmed by the use of DDT spray for control of the spruce budworm. |
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| We have also had all the losses due to the pine beetle in western Canada and the spruce budworm. |
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| Spruce budworm and western beetles are wreaking havoc in many of Canada's forests. |
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| In an ecological sense, spruce budworm epidemics would be very good because they would eliminate the old trees and cause regeneration of forests. |
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| The decline of grosbeak winter invasions in the 1980s may be tied to the end of a huge infestation of budworm in the eastern provinces. |
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| Subjects include heronries, water quality, spruce budworm, tree regeneration after the 1998 Ice Storm and others. |
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| Chemist Lorne Elias led an NRC team that was monitoring pesticide drift from the aerial spraying against the budworm. |
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| In the case of some insect infestations, particularly spruce budworm and gypsy moth, repeated defoliation can cause the death of trees over a large area of forest. |
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| The spruce budworm is a major insect defoliator of forests in northeastern North America, with balsam fir and white spruce figuring as the most vulnerable species. |
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| According to the proponents of the silvicultural hypothesis, several processes combined to make forests increasingly vulnerable to budworm outbreaks. |
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| Though this might seem to represent a trend toward a more benign way of reconciling the budworm and the forest ecosystem, the approach has obvious limits. |
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| However, the continuing logic of comprehensive chemical spray was soon accepted, as the budworm was found to rebound quickly and move readily across space. |
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| Description: We see barrels of insecticide used to fight spruce budworm. |
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| The respondent recommends that the section on climate change include both positive and negative effects: outbreaks of the spruce budworm have been eliminated but mountain pine beetle has increased. |
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| Examples of defoliators are spruce budworm and hemlock looper. |
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| As an undergraduate student she worked for six years for the then federal Fisheries and Forestry Department on genetics of the spruce budworm with reference to the visual system. |
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| Recent studies of heavy spring concentrations of Evening Grosbeaks in Quebec and in New Brunswick have disclosed a close predator-prey relationship between this bird and a serious pulpwood forest pest, the spruce budworm. |
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| Guidelines for monitoring and controlling native budworm are available to help grain growers minimise crop damage caused by the late-season pest. |
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| Ultrastructural effects of a nonsteroidal ecdysone agonist, RH-5992, on the sixth instar larva of the spruce budworm, Choristoneura fumiferana. |
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| In Quebec, power costs played a role in these decisions, as well as the spruce budworm infestation. |
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| In the early 1960s, an NRC team was monitoring pesticide drift from aerial spraying intended to kill off the damaging spruce budworm that was ravaging Canada's eastern forests. |
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| Foresters used the insecticide to control Western spruce budworm, a voracious defoliator of Douglas fir. |
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| Incidentally, geranium budworm is quite similar to corn earworm, a pest that has been known to gobble up ears of corn in certain Valley gardens. |
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| In 1969, the forestry industry stopped using DDT to control a spruce budworm outbreak, but switched to the insecticide fenitrothion, which is highly toxic to pollinators. |
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| Because of the scale of the spray program, which peaked at 3.9 million hectares during the budworm outbreak in the 1970s, even this lesser impact was judged to be unacceptable, and alternative insecticides are now used. |
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| For example, in forests in Canada the spruce budworm is a major pest. |
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| A management plan to curb an outbreak of the jack pine budworm on trees covering almost 90,000 hectares in the Rainy River district is being welcomed by forest licensers. |
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| Abundance and life cycles of Lepidoptera associated with an outbreak of the western spruce budworm Choristoneura occidentals in southeastern Idaho. |
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