age-specific life table techniques were applied to field collected data 0f the lack bean aphid, Aphis craccivora to examine the effect of favorable and unfavorable temperature conditions on life table parameters. Lower and higher temperature extremes in winter and late summer were found to delay development and shorten adult longevity as well as exhibiting a marked effect on natality and mortality schedules. As a consequence the gross reproductive rate, intrinsic rate of natural increase, and finite rate of population increase were reduced whereas the population doubling time lenthened as compared with the same demographic statistic under more favorable temperature conditions in early summer, mid summer and fall. Values varied among temperature regimes when times were expressed in days , but converged somewhat , when expressed in degree-days (DD). The proportion of hmmatures decreased and the proportion of adults increased with increasing temperature.
Species 1: Homoptera Aphididae APHIS CRACIVORA
Keywords: aphids, bean
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