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Effects of Hypera nigrirostris, Hylastinus obscurus, and Sitona hispidula Populations on Red Clover in Southwestern Idaho1

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Thc lesser clover leaf weevil, Hypera nigrirostris (F.), was shown to have little effect on red clover seed yields in Idaho. The clover root borer, Hylastinus obcurus (Marsham) , and the clover root curculio, Sitona hispidula (F.) , lowered both the longevity and seed yields of red clover fields. A high population of these beetles usually resulted in un thrifty stands and in a lowering of expected yields. Populations of these 2 root-damaging species were rather closely correlated with the number of roots expressing disease symptoms. In the first seed crop year, spring-planted red clover fields generally had higher populations of all 3 beetles than fall-planted fields. Granular forms of heptachlor and dieldrin were used to manipulate the insect populations in this study.

Document Type: Research Article

Publication date: December 1, 1964

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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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