Author
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Robinson, Arin |
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Percival Jr, Albert |
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Submitted to: Journal of Nematology
Publication Type: Abstract Only Publication Acceptance Date: 9/15/2000 Publication Date: N/A Citation: N/A Interpretive Summary: Technical Abstract: Within the last 10 years, the reniform nematode (Rotylenchulus reniformis) has become recognized as the most serious nematode problem of cotton in Louisiana, Mississippi, and Alabama. The Cooperative Extension Service in each state has conducted nematicide and crop rotation studies to provide farmers with immediate management options because no known cultivar and only four breeding lines have been reported to show any resistance whatsoever to this nematode. Unfortunately, management of the reniform nematode in cotton with nematicides and crop rotation has turned out to be marginally cost effective and economically risky. This publication presents results of several studies to find the genetic resources needed to develop cotton cultivars that are resistant to the reniform nematode. Many commercial cultivars of cotton were tested and all were found to support prolific reproduction. However, some cultivars clearly support less reniform nematode reproduction than others. Strong resistanc has been found primarily in the wild cottons known as G. arboreum, G. herbaceum, G. longicalyx, and G. barbadense. These species have only limited genetic compatibility with the agronomically adapted commercial types of upland cotton that farmers grow, indicating that additional studies must be designed to evaluate 2000 previously untested primitive upland cottons, which are closely related to commercially grown types. |
