Starks, K.J. and Burton, R.L. and Merkle, O.G. (1983) Greenbugs (Homoptera: Aphididae) plant resistance in small grains and sorghum to biotype E. Journal of Economic Entomology, 76 (4). pp. 877-880.
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Abstract
During the winter of 1979-80, a new biotype of Schizaphis graminum (Rond.), designated biotype E, was collected from a wheat field at Bushland, Texas. The reaction of various food-plants to the new biotype were examined in subsequent greenhouse and growth-chamber studies in Oklahoma by measuring one or more of the mechanisms of plant resistance. The resistant wheats Amigo and Amigo/Payne did not possess the antibiosis and tolerance previously experienced against biotype C but retained their antixenosis, as did Gaucho, a triticale from which Amigo was developed. The wheat Largo appeared as resistant to biotype E as it was previously to biotype C. The reaction of the rye Insave F.A. suggested that more than one gene for resistance was involved, but unfortunately the one gene effective against biotype E was not transferred to Amigo. Oats seemed to be little affected by the biotype change. The new biotype was able to injure previously resistant sources of feed barley, although some antibiosis was still effective. Commercial grain sorghum lines, previously resistant to the aphid, were found to be susceptible, but PI220248, PI264453 and Capbam exhibited a useable level of resistance to biotype E. Bloomless (bm bm) appeared to maintain its resistance and was effective against biotype E. In general, it was considered that the occurrence of the new biotype had affected many of the previously resistant genotypes that had been developed in small grains and sorghum
| Item Type: | Article |
|---|---|
| Author Affiliation: | Plant Science Research Laboratory, ARS, USDA, PO Box 1029, Stillwater, Oklahoma 74076, USA |
| Subjects: | Plant Protection > Pests |
| Divisions: | Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 24 Feb 2012 06:32 |
| Last Modified: | 24 Feb 2012 06:33 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/3213 |
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