Association of an Endophytic Fungus in Perennial Ryegrass and Resistance to the Hairy Chinch Bug (Hemiptera: Lygaeidae)

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Laboratory tests demonstrated that 'Repell,' a cultivar of perennial ryegrass, Lolium perenne L., infected with the fungal endophyte, Acremonium lolii Latch, Christensen & Samuels, exhibited a high level of insect resistance to the hairy chinch bug, Blissus leucopterus hirtus Montandon. First and third instars and adult hairy chinch bugs reared on endophyte-infected plants had significantly lower survival. On endophyte-free 'Repell,' nymphs and adults resided primarily on the leaf sheath. In contrast, on endophyte-infected 'Repell,' nymphs and adults either avoided the plant or resided only on the endophyte-free leaf blade. Nymphs were able to detect the presence of the endophyte in a choice test and consistently selected endophyte-free 'Repell.' These results support field observations of resistance in association with endophyte-infected ryegrass and suggest that the incorporation of endophytes into ryegrass will lead to significant reductions in hairy chinch bug infestations.

Document Type: Research Article

Publication date: August 1, 1990

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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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