Summer Cropping Effects on the Abundance of Meloidogyne arenaria Race 2 and Subsequent Soybean Yield
AbstractA summer-planted crop of alyceelover significantly (P 0.05) increased the soil abundance of Meloidogyne arenaria race 2 juveniles by 3.7-fold when measured in the following spring. Maize, sorghum, and soybean had no significant effects on residual nematode numbers over the same period. Summer plantings of aeschynomene, cotton, hairy indigo, tespedeza, millet, peanut, and sorghum-sudangrass were as efficient as fallow in reducing root-knot nematode population levels. Soybean yields (averaging 2,156 kg/ha) were significantly increased over that of monocultured soybean (1,179 kg/ha) when grown in soil previously fallowed or planted to aeschynomene, hairy indigo, peanut, and sorghum. No significant differences in yields were achieved from soybean when grown in soil previously cropped to alyceclover, cotton, lespedeza, maize, or sorghum-sudangrass. Nematode numbers, which average 2,140 juveniles/100 cm³ soil following the second year of cropping with soybean, were not related to previous cropping history and had increased an average of 9.3-fold over the course of the study. Key words: aeschynomene, alyceclover, cotton, fallow, hairy indigo, lespedeza, maize, Meloidogyne arenaria race 2, millet, nematode, peanut, root-knot galling, rotation, sorghum, sorghum-sudangrass, soybean, yield.
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).