Activity of 1st-instar Diaprepes abbreviatus (L.) was studied to determine their susceptibility to biological and cultural control and to obtain the minimum amount of information needed to develop a bioassay for soil insecticides against the larvae. Results showed that eggs in egg masses between leaves hatched (144 to 224 h after oviposition) before the larvae dropped to the ground (235 to 248 h after oviposition). Larvae remained on the soil surface no longer than 3 h, between 1100 and 2400 h, and penetrated soil optimally (P = 0.05) when its moisture was between 7 and 16.7%. They did not penetrate dry soil. Larvae that were 64 h old penetrated soil most effectively (P = 0.05). A prototype soil-insecticide bioassay chamber developed on the basis of these data showed that 84% of larvae penetrated 10 cm of soil in 13 days.
Document Type: Research Article
Publication date: June 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.