Natural Predation on the Cotton Leafworm (Lepidoptera: Noctuidae)

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Abstract:

Radioactive Alabama argillacea (Huebner) eggs and first instars were placed in an east Texas cotton field during 1982. The following arthropods showed evidence of predation on eggs: the insects Solenopsis invicta Buren, Orius tristicolor (White), Geocoris punctipes (Say), Tropiconabis capsiformis (Germar), Ceratocapsus sp., Pseudatomoscelis seriatus (Reuter), and a coccinellid larva; and the spiders Peucetia viridans (Hentz), Chiracanthium inclusum (Hentz), Aysha gracilis (Hentz), and Neoscona arabesca (Walckenaer). Predators of 1st instars included the insects S. invicta,G. punctipes, G. uliginosus (Say); and the spiders Misumenops sp., Tetragnatha laboriosa Hentz, A. gracilis. P. viridans, C. inclusum. Hentzia palmarum (Hentz); and an erigonid. Means for egg and small larval predation, after 48 h of exposure, were 88.7 and 88.4%, respectively. Predator efficiency values were calculated for all radioactive species captured and reported as number of eggs or larvae consumed per 24 h. The number of eggs consumed/predator/day, ranged from 7.29 for Ceratocapsus sp. to 0.017 for S. invicta, and the number of larvae from 4.8 for A. gracilis to 0.41 for P. viridans.

Document Type: Research Article

Publication date: August 1, 1983

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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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