Environmental Entomology (1989) 18, 552-557

Robert R. Rojas, John G. Riemann and Roger A. Leopold (1989)
Diapause and overwintering capabilities of the larva of Homoeosoma electellum (Lepidoptera: Pyralidae)
Environmental Entomology 18 (4), 552-557
Abstract: Before cold acclimation; diapausing mature larvae of Homoeosoma electellum (Hulst) have glycogen levels two times, greater than nondiapausing mature larvae, trehalose levels are 30 times greater, and larvae have a lower supercooling point by approximately 8°C. Significant increases in trehalose occurred in diapausing larvae kept at 5'C for 7 and 18 d and at 0°C after 10 d. In most cases, there was a sufficient concomitant reduction in glycogen to account for the trehalose increases. Nondiapausing larvae in the temperature treatment groups of 10, 5, and 0°C showed significantly greater trehalose levels over initial values; yet these levels are almost two times lower than initial levels in diapausing larvae and three times lower than the greatest levels achieved in this study by diapausing larvae cold-acclimated to 0°C. No specific relationship was found between temperature acclimation and supercooling capacity in diapausing or nondiapausing larvae. Nondiapausing larvae died after being held at -10°C for 1 d, whereas 44% of the diapausing larvae survived to pupation after 3 d of exposure.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Roger A. Leopold

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.
	Homoeosoma electellum