Environmental Entomology (1984) 13, 86-94

William K. Mellors, Annalisa Allegro and Alvin M. Wilson (1984)
Temperature-dependent simulation of the effects of detrimental high temperatures on the survival of Mexican Bean beetle eggs (Coleoptera: Coccinellidae)
Environmental Entomology 13 (1), 86-94
Abstract: Eggs of the Mexican bean beetle, Epilachna varivestis Mulsant (Coleoptera: Coccinellidae), were exposed for durations of 1/30, 1/10, 1/4, 1/2, 1, 2, 4, 6, and 24 h to temperatures of 30, 35, 38, 40, 42, and 44°C and then were hatched at 25°C. Unexposed controls were maintained at 25°C. Survival as a percentage of that for unexposed eggs decreased with increasing exposure times at temperatures above 30°C, but developmental periods did not differ for any temperature-exposure combination at which hatch occurred. From the survival-exposure relationship for each temperature, the exposures that resulted in 90, 70, 50, 30, and 10% survival were determined, and the reciprocals of the exposures (x 100%) gave the rates of injury accumulation required to cause mortality of 10, 30, 50, 70, and 90% of the eggs, respectively. The injury accumulation rate-temperature relationships for those five mortality levels were used successfully to simulate the survival of nine egg cohorts under fluctuating temperature conditions in the greenhouse and to predict the abundance of 1st-instar larvae from observed oviposition in one soybean field.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)

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

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Epilachna varivestis	Soybean (Glycine max)	U.S.A. (NE)