Parker, C. and Reid, D.C. (1980) Testing sorghum and other crops for resistance to witchweed. Other. Agricultural Research Council Weed Research Organization, Yarnton, UK.
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Abstract
Pot experiments confirmed the resistance to Striga hermontheca of low-stimulant sorghum varieties selected by breeders in N. Nigeria and also revealed resistance to a wide range of strains of both S. hermontheca and S. asiatica. Stimulant-positive varieties showed inconsistent results. Varieties selected by ICRISAT for their low stimulation of the Indian S. asiatica proved relatively susceptible to several strains of S. hermontheca. Laboratory germination studies showed that whereas the exudate activity of low-stimulant varieties may be 100 times less than in susceptible varieties, the difference may only be about 5 times less in the case of S. hermontheca. The pot experiments showed an almost perfect specificity of certain strains of S. hermontheca to bulrush millet (Pennisetum americanum) and also showed that, generally, strains of the parasite associated with sorghum did not germinate in response to millet and vice versa. Four strains of S. gesnerioides were found to be specific to their original hosts but exudate tests showed that this specificity was not due to simple differences in germination requirement
| Item Type: | Monograph (Other) |
|---|---|
| Author Affiliation: | ARC Weed Research Organisation, Yarnton, Oxford OX5 1PF, UK |
| Subjects: | Plant Protection |
| Divisions: | Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 20 Dec 2012 05:22 |
| Last Modified: | 20 Dec 2012 05:22 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/9179 |
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