Variation in the virulence ofAlectra vogeliipopulations on cowpea
作者:
T. I. Polniaszek,
C. Parker,
C. R. Riches,
期刊:
Tropical Pest Management
(Taylor Available online 1991)
卷期:
Volume 37,
issue 2
页码: 152-154
ISSN:0143-6147
年代: 1991
DOI:10.1080/09670879109371564
出版商: Taylor & Francis Group
关键词: Crop resistance;cowpea;Alectra vogelii
数据来源: Taylor
摘要:
In glasshouse pot experiments 25 cowpea lines were exposed to samples of the parasitic weedsAlectra vogeliiBenth., from several localities in West and Southern Africa, andStriga gesnerioides(Willd.) Vatke from Mali. The lines used were mainly those reported to have resistance to one or other parasite. No general cross‐resistance was observed and the resistance genes are assumed to be different for the two parasite species. Cowpea lines from Botswana, exposed to BotswanaAlectrasamples, showed responses ranging from complete resistance to susceptibility, in keeping with their reported behaviour in the field. All Botswana lines, however, showed almost complete resistance toAlectrasamples from West Africa. It is concluded that there is an important difference between West and Southern African populations ofA. vogelii.On the basis of these results it should be relatively easy to develop Alectra‐resistant cowpea varieties for use in West Africa.
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