Forage Destruction by Aulocara elliotti (Orthoptera: Acrididae) on Rangeland in the Southwestern United States
Authors: THOMPSON, D. C.; TORELL, L. A.; HUDDLESTON, E. W.; DAVIS, J. H.
Source: Journal of Economic Entomology, Volume 88, Number 5, October 1995 , pp. 1455-1460(6)
Publisher: Entomological Society of America
Abstract:Forage destruction rates of the big-headed grasshopper, Aulocara Elliotti (Thomas), on southwestern rangelands dominated by the C4 warm-season grass, Bouteloua gracils (Humboldt, Bonpland, & Kunth) Griffiths, were studied in 1987 and 1989. To obtain variable grasshopper defoliation pressures, A. elliotti were caged at densities ranging from 0 to 40 grasshoppers per square meter. Precipitation (both natural and supplemental) and grasshopper feeding days were used to predict forage production and grasshopper forage destruction using regression analysis. Total forage destruction rates varied between sites (38-64 mg total forage per feeding day) but not between years at a given site. When forage was increased by adding supplemental water, destruction rates were not influenced. Estimated forage destruction rates were similar to values reported for studies in northern climates where cool-season grasses predominate. However, under the conditions of this study, A. elliotti was less selective of host plants than has been reported in other feeding studies.
Document Type: Research Article
Publication date: October 1995
- 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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