Response of Winter Barley Yield and Yield Components to Spring Infestations of the Hessian Fly (Diptera: Cecidomyiidae)

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The effect of spring infestations of the Hessian fly, Mayetiola destructor (Say), on grain yield and yield components of winter barley, Hordeum vulgare L., was studied in Georgia during a severe outbreak in 1988-1989. In a small-plot study with a number of resistant and susceptible cultivars and lines, grain yield declined when spring Hessian fly infestations exceeded 40% infested culms (stems) or 1.0 immature per culm. Grain test weight was not significantly affected by Hessian fly damage. 'Anson' barley and two experimental lines were highly resistant Resistance presumably was caused by antibiosis that killed first instars. Examination of single culms indicated that grain weight per spike declined with increasing number of immatures per culm up to four immatures per culm, with the largest decline occurring between zero and one immature per culm. Reduced grain weight of spikes was largely attributable to fewer seeds per spike, which was caused by a reduction in spikelets per spike. Hessian fly injury affected weight per seed much less than seed number per spike. Incorporating Hessian fly resistance into barley may be useful in areas where the potential for Hessian fly damage is great

Document Type: Research Article

Publication date: December 1, 1992

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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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