Food-Plant Tests with the Differential Grasshopper

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In tests with the differential grasshopper, Melanoplus differentialis (Thomas), at Tempe, Arizona, an exclusive diet of alfalfa was inadequate for complete nymphal development. No nymphs survived from the egg to the adult stage 011 that diet. Only 18% of field-collected second-instar nymphs reached the adult stage, and these averaged much below normal in size. Survival to the adult stage was 82 to 90% on a favorable mixed diet. Increasing the density of a food plant in laboratory cages increased the amount of feeding on that plant in relation to feeding on another food plant present. Weed control in alfalfa fields would probably reduce infestations of the differential grasshopper.

Document Type: Research Article

Publication date: June 1, 1963

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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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