Twenty-six plant lectins were tested for antiinsect properties against neonate European corn borer, Ostrinia nubilalis (Hiibner), and Southern corn rootworm, Diabrotica undecimpunctata howardi Barber, larvae. Lectins from wheat, Triticum vulgaris L., castor beans, Ricinus communis L., and camels foot tree, Bauhinia purpurea L., were lethal to neonate O. nubilalis larvae when applied topically to the diet surface as a 2% solution. The LC..,'s for lectins from R. communis, T. vulgare, and B. purpurea incorporated into the artificial diet were 0.29, 0.59, and 0.73 mg/g of diet, respectively. Surviving larvae had a 50% weight loss compared with control larvae at these concentrations. No other lectins affected larval growth or mortality of O. nubilalis. Lectins from R. communis, pokeweed (Phytolacca Americana L.), and green marine algae, Codium fragile (Suringar), were toxic to neonate D. undecimpunctata howardi larvae when applied topically (2%) to the artificial diet. Several other lectins inhibited larval growth by >40% compared with the control. These lectins were from jackfruit, Artocarpus integrifolia Lamarck, hairy vetch, Vicia villosa Roth, osage orange, Mac1ura pomifera Rafinesque, Bandeiraea simplicifolia (Baillon), and T. vulgaris. Transformation of the genes coding these lectins could be beneficial in the development of insect resistance in important agronomical crops.
Document Type: Research Article
Publication date: December 1, 1990
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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.