New Resistant Germplasm to the Chinch Bug (Heteroptera: Lygaeidae) in Grain Sorghum: Contribution of Tolerance and Antixenosis as Resistance Mechanisms

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Newly identified sorghum lines resistant to chinch bug, Blissus leucopterus Leucopterus (Say),were compared with a previously studied 'kafir'-derived resistance source ('Atlas') in multiple-choice and two-choice seedling preference tests and in a no-choice seedling tolerance test. High antixenosis and tolerance levels were found in some new resistance sources, with levels equivalent to or significantly better than that in 'Atlas.' Antixenosis was variable with the range of choices offered and post infestation time. Initial tolerance of some entries was favorably influenced by superior plant vigor, but after 10 days of feeding significant plant death occurred on all but one new resistance source.

Document Type: Research Article

Publication date: February 1, 1986

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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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