Environmental Entomology (1983) 12, 680-686

R.M. Nowierski, A.P. Gutierrez and J.S. Yaninek (1983)
Estimation of thermal thresholds and age-specific life table parameters for the walnut aphid (Homoptera: Aphididae) under field conditions
Environmental Entomology 12 (3), 680-686
Abstract: Methods are presented for estimating upper and lower thermal thresholds for walnut aphid development from field data. Age-specific life table techniques are also applied to field data to examine the effects of favorable and unfavorable temperatures on life table parameters. High-temperature extremes were found to delay development, shorten adult longevity, and reduce fecundity. As a consequence, the net reproductive rate and intrinsic rate of increase were reduced and the population doubling time lengthened as compared with life table parameters measured under more favorable temperature conditions.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Andrew Paul Gutierrez, Robert M. Nowierski

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
environment - cropping system/rotation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Chromaphis juglandicola	Walnut/butternut (Juglans)	U.S.A. (SW)