Evaluation of New Zealand Barleys for Resistance to Mayetiola destructor and M. hordei (Diptera: Cecidomyiidae) and the Effect of Temperature on Resistance Expression to Hessian Fly
Authors: LHALOUI, S.; HATCHETT, J. H.; WILDE, G. E.
Source: Journal of Economic Entomology, Volume 89, Number 2, April 1996 , pp. 562-567(6)
Publisher: Entomological Society of America
Abstract:Six New Zealand barleys were evaluated for resistance to biotype L of the Hessian fly, Mayetiola destructor (Say), the most virulent biotype that infests wheat in the United States. Three of the barleys, 'Gwylan', 'WPBS 316/80'. and 'Fleet'. were found to be resistant to biotype L and were tested to Hessian fly and the stem gall midge M. hordei Keiffer in Morocco. Because high temperature may affect the expression of resistance to Hessian fly, the temperature sensitivity of resistance to biotype L also was assessed at constant temperatures of 18, 24, and 30. Resistance tests demonstrated that Gwylan, WPBS 316/80, and Fleet were highly resistant to biotype L and Moroccan Hessian fly, but were susceptible to stem gall midge larvae. Resistance was expressed mainly as antibiosis, with 1st instars dying after feeding on resistant plants. Small numbers of larvae survived on resistant plants and appeared to develop normally, indicating that a tolerance mechanism also may be involved. Neither plant resistance nor the level of antibiosis expressed in the three cultivars was affected by increasing temperature up to 30. The results indicate that the New Zealand barleys carry resistance genes different than those previously identified in barley and would be excellent sources for breeding Hessian fly-resistant cultivars in the United States and Morocco.
Document Type: Research Article
Publication date: April 1, 1996
- 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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