POPULATION CHANGE IN AN OUTBREAK OF THE DOUGLAS-FIR TUSSOCK MOTH, ORGYIA PSEUDOTSUGATA (LEPIDOPTERA: LYMANTRIIDAE), IN CENTRAL ARIZONA
1974 ◽
Vol 106
(11)
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pp. 1171-1174
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AbstractChanges in population density were evaluated over an outbreak cycle of the Douglas-fir tussock moth. Growth rate of populations was independent of larval density in the first year, but thereafter became a reciprocal function of density, terminated by complete population collapse at the end of the third year. Through correlation analyses, it was found that density of small larvae accounted for a large proportion of the change in population density between years. This suggests that the local infestations developed largely from resident populations of at least 2 years and not from spread of early instar larvae during the outbreak.
Keyword(s):
1985 ◽
Vol 117
(9)
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pp. 1111-1115
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Keyword(s):
Keyword(s):
1979 ◽
Vol 111
(10)
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pp. 1145-1159
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Keyword(s):
Keyword(s):