What people are saying - Write a review
We haven't found any reviews in the usual places.
WEATHER FACTORS TESTED
VALUE OF FACTORS FOR INCREASING AND DECREASING
2 other sections not shown
40-year means 6-week period following Agric Armstrong balsam fir Blais Brunswick budworm attack Canada Chicoutimi Choristoneura fumiferana climatological stations cool falls Craighead l924 cumulative number Daviault decreasing populations defoliation dotted line Dowden dynamics of epidemic Elliot l960 emergence and third Environment epidemic spruce budworm estimated peak third favorable weather following estimated peak forest composition Forest Insect Survey forest tent caterpillar fumiferana Clem Grand Falls Greenbank l956 H rH H heavily stippled hibernaculae initiation of outbreaks Insect Survey Forest larvae Lepidoptera Manitoba Maniwaki Minima F minimum air temperatures Morris l963b mortality of balsam number of heat Ottawa outbreak history overwintering peak third instar period following estimated population trends pupae rH H rH rH rH Sioux Lookout spruce budworm outbreaks spruce budworm populations summer heat units Survey Forest Insect Tortricidae units above 40°F units and summer values variables Weather and Outbreaks weather conditions Wellington