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Fall Armyworm (Lepidoptera: Noctuidae) Feeding Responses on Corn Foliage and Foliage/Artificial Diet Medium Mixtures at Different Temperatures

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Abstract:

Developmental time, fresh weight, and leaf consumption were determined for larvae of the fall armyworm (FAW), Spodoptera frugiperda (J. E. Smith), fed four corn genotypes at three different temperature regimes. Temperature and corn genotype had significant (P <0.05) effects on fresh weight of FAW larvae and the amount of corn leaf tissue consumed. Fresh weight of FAW larvae and the amount of leaf tissue consumed by an individual larva were significantly (P < 0.05) greater for the FAW larvae fed the susceptible genotype 'Cacahuacintle X's' than for those larvae fed the resistant genotype 'MpSWCB-4.' Developmental time and weight were determined for FAW larvae fed corn foliage/diet medium mixtures at three different temperatures. No differences in weight of FAW larvae fed excised leaves of susceptible and resistant genotypes were detected at 25°C but differences were found between genotypes at 30°C and the fluctuating temperature regime of 31/20°C. This variation, between temperatures, did not occur when comparisons were made between susceptible and resistant genotypes using the foliage/diet medium mixture technique.

Document Type: Research Article

Publication date: April 1, 1985

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  • 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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