The Effect of Soil Texture and Irrigation on Rotylenchulus reniformis and Cotton
AbstractThe reniform nematode, Rotylenchulus reniformis, is the most damaging nematode pathogen of cotton in Alabama. Soiltexture is currently being explored as a basis for the development of economic thresholds and management zones within a field.Trials to determine the reproductive potential of R. reniformis as influenced by soil type were conducted in microplot and greenhousesettings during 2008 to 2010. Population density of R. reniformis was significantly influenced by soil texture and exhibited a generaldecrease with increasing median soil particle size (MSPS). As the MSPS of a soil increased from 0.04 mm in clay soil to > 0.30 mm invery fine sandy loam and sandy loam soils, R. reniformis numbers decreased. The R. reniformis population densities on all soil typeswere also greater with irrigation. Early season cotton development was significantly affected by increasing R. reniformis Pi, with plantshoot-weight-to-root-weight ratios increasing at low R. reniformis Pi and declining with increasing R. reniformis Pi. Plant height wasincreased by irrigation throughout the growing season. The results suggests that R. reniformis will reach higher population densities insoils with smaller MSPS; however, the reduction in yield or plant growth very well may be no greater than in a soil that is lesspreferential to the nematode.
Copyright and Permissions
All material published by the Society of Nematologists (SON), except for papers prepared by United States and Canadian government employees, is copyrighted and protected under the U.S. copyright law. Under the Copyright Act of 1976, the term of copyright for materials registered by an organization is 75 years from the date first published. Before publishing any manuscript, SON requires that authors transfer full and complete ownership of any copyright to SON by signing a JON Page Charge/Copyright Form (.pdf). SON then registers the copyright. Subsequent use of published materials requires written permission from the SON and may be obtained by contacting the current Editor-in-Chief and state where and how the material will be used.
The author warrants that the article is an original work not published elsewhere in whole or in part, except in abstract form, and that the author has full power to make this grant. If portions of the article have been published previously, then the author warrants that permission has been obtained from the copyright holder and the author will submit a copy of the permission release with this copyright transfer form.
SON shall claim no proprietary right other than copyright. Authors and coauthors retain the right to revise, adapt, modify, or otherwise use all or part of the article in future works of the author(s), such as press releases, lectures, and reviews, provided that all such use is for the personal noncommercial benefit of the author(s). All patent rights are retained by the author(s).