Reemergence ofDendroctonus frontalis(Coleoptera: Scolytidae) at Constant Temperatures1
作者:
J. A. Gagne,
T. L. Wagner,
P. J. H. Sharpe,
R. N. Coulson,
W. S. Fargo,
期刊:
Environmental Entomology
(OUP Available online 1982)
卷期:
Volume 11,
issue 6
页码: 1216-1222
ISSN:0046-225X
年代: 1982
DOI:10.1093/ee/11.6.1216
出版商: Oxford University Press
数据来源: OUP
摘要:
This laboratory study investigates the effects of constant temperature on reemergence of the southern pine beetle,Dendroctonus frontalisZimmermann. Beetles reemerged at temperatures between 12.5 and 33.3°C, with the relationship of adult residence time and constant temperature forming a backwards “J”-shaped curve. Adult residence time was greatest at 12.5°C (46 days) and least at 27°C (12 days). The distributions of those times changed with temperature. At 12.5 and 15°C, the distributions were near uniform, but as temperature increased to 30°C, the distributions became peaked and skewed right. Above 30°C, the distributions became less peaked. About 90% of the beetles reemerged at temperatures between 12.5 and 30°C, whereas above 30°C the percentage dropped precipitously. Males reemerged 1 or 2 days before females at temperatures below 30°C, but the reverse condition was found at 30°C or above. A two-component model is used to predict reemergence as a function of temperature. The first component describes reemergence rates as a function of temperature. The second component distributes the reemerging population over physiological time. When combined, these components distribute reemergence over calendar lime, and are Suitable for incorporation into a larger population model ofD. frontalis.
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