Effects of Sunlight, Cotton Foliage Surface, and Temperature on the Infectivity of Cytoplasmic Polyhedrosis Virus to Heliothis virescens Larvae (Lepidoptera: Noctuidae)
Authors: Ali, Said; Sikorowski, P. P.
Source: Journal of Economic Entomology, Volume 79, Number 2, April 1986 , pp. 364-367(4)
Publisher: Entomological Society of America
Abstract:Effects of solar radiation, cotton foliar surface, and temperature on infectivity of cytoplasmic polyhedrosis virus (CPV) to 5-day-old tobacco budworm, Heliothis virescens (F.), larvae were studied under laboratory and field conditions. Infectivity of CPV spread on foliage varied with the number of langleys (a unit for measuring solar radiation) received during exposure to sunlight (infectivity of 98.00, 73.50, 20.75, and 7.00% for 0, 200, 300, and 400 langleys, respectively). Incubation in darkness (at the same temperatures needed to receive 0, 200, 300, and 400 langleys) produced a 13.9% loss of CPV infectivity because of a direct effect of cotton foliage surface. Temperature had no significant effect on CPV infectivity after incubation up to 33°C (2.1 h). pH values of cotton foliage surfaces (treated with CPV and untreated) increased in sunlight and in darkness.
Document Type: Research Article
Publication date: April 1, 1986
- 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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