Survival, Growth, Fecundity, and Behavior of Helicoverpa armigera (Lepidoptera: Noctuidae) on Pigeonpea and Two Wild Cajanus Species
Authors: SHANOWER, THOMAS G.; YOSHIDA, MITSURU; ETER, JOHN A.
Source: Journal of Economic Entomology, Volume 90, Number 3, June 1997 , pp. 837-841(5)
Publisher: Entomological Society of America
Abstract:Survival, growth, fecundity, and behavior of Helicoverpa armigera (Hübner) were compared on pods of cultivated pigeonpea, Cajanus cajan (L.) Millspaugh, and 2 wild species, C. scarabaeoides. (L.) Thouars, and C. platycarpus (Bentham) van der Maeson. Larval survival was 21% on C. scarabaeoides, 56% on C. platycarpus, and 78% on C. cajan. Pupal survival was high on all 3 Cajanus species. Seven-day-old larvae reared on C. scarabaeoides pods weighed significantly less at 18 d, took longer to pupate and produced significantly smaller pupae than those fed on C. cajan pods. Larval period and weight, and pupal weight when reared on C. platycarpus were intermediate and significantly different from the other 2 species. Differences in pupal duration were not significant between larvae reared on the 3 Cajanus species. Larvae on C. scarabaeoides spent significantly less time feeding and significantly more time off the pod than larvae on the oilier 2 species. Acetone extracts of C. cajan and C. platycarpus pods had a significant feeding stimulant effect on H. armigera larvae, whereas extracts from C. scarabaeoides pods had no effect. Water extract of C. scarabaeoides pods had a significant antifeedant effect though similar extracts from C. cajan and C. platycarpus pods had no effect. Application of these results to resistance breeding programs is discussed.
Document Type: Research Article
Publication date: June 1, 1997
- 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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