Effect of Temperature on Rate of Development and Survival of Simyra henrici1•2
Authors: DECKER, GEORGE C.; MADDOX, J. V.
Source: Journal of Economic Entomology, Volume 64, Number 1, February 1971 , pp. 94-98(5)
Publisher: Entomological Society of America
Abstract:Eggs of Simyra henrici (Grote) had incubation periods ranging from 20 days at 14.4 to 3 days at 32.2 . Developmental velocity was a straight-line relationship. The theoretical threshold of egg development was about 11.1. Larval development was completed in 7 or 8 instars at temperatures from 14.4° to 32.2. The theoretical threshold of larval development was 10, and the mean degree-day requirement for completion of the larval period was 502.0. The rate of larval development also showed a straight-line relationship at these temperatures. The duration of the larval period ranged from 22.7 days at 32.2 to 56.7 days at 18.3 for larvae having 7 instars and from 24.3 to 62.7 at these same temperatures for larvae having 8 instars. The combined prepupal and pupal periods ranged from 11 days at 32.2 to 42 days at 15.6 with a degree-day requirement of 248.3 based on the 10 threshold temperatures. The entire life cycle ofS. henrici ranged from 37.5 days at 32.2 to 97.2 days at 18.3 with a mean degree-day requirement of 806.9 over the 10 threshold.S. henrici overwinter as pupae. and the supercooling points of 11 pupae ranged from -21.1° to -27.8. Pupae exposed to natural outdoor conditions had a mean survival rate of 15.5% in 1964-65. The severity of winter greatly influenced the number of S. henrici adults present the following summer.
Document Type: Research Article
Publication date: February 1, 1971
- Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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