Persistence of Egg Masses of the Range Caterpillar in Grazed and Ungrazed Rangeland

Authors: Bellows, Tom S.; Owens, John C.; Huddleston, Ellis W.

Source: Journal of Economic Entomology, Volume 75, Number 4, August 1982 , pp. 574-576(3)

Publisher: Entomological Society of America

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Abstract:

Rates of disappearance of egg masses of Hemileuca oliviae Cockerell were quantified in plots open to grazing and protected from grazing over winter in three topographical positions on a hillside in Lincoln County, N. M. There were no differences in disappearance rates between fenced and unfenced plots on the lowest hillside position, which supported a stand of grass of a type not foraged by the sheep. Significant differences were found between fenced and unfenced plots on the other two hillside positions where grazing occurred. Over a 5-month period, an estimated 74.5% of the egg masses disappeared from grazed plots, whereas only 38.3% disappeared from ungrazed plots. The differences were sufficiently large to suggest that winter grazing should be considered as one component of an integrated management program for this species.

Document Type: Research article

Publication date: 1982-08-01

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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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Persistence of Egg Masses of the Range Caterpillar in Grazed and Ungrazed Rangeland

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