Response of Nematode Communities to Sudangrass and Sorghum-Sudangrass Hybrids Grown as Green Manure Crops
Abstract
Two cultivars of sudangrass (Piper and Trudan 8) and three of sorghum-sudangrass (Sordan 79, P855F, and P877F) were grown as green manure crops in 1993 and 1994 and compared with sweet corn for their impact on nematode population dynamics. Nematodes were identified to trophic group, order, and to lower taxa when possible. Population densities were determined after 7 weeks of crop growth and 3 weeks after incorporation of green crop residue. Plant-parasitic nematode genera included Pratylenchus, Longidorus, Xiphinema, and Paratrichodorus. The plant-feeder trophic group increased or was maintained on all crops after 7 weeks, at which time population densities were lowest on corn in 1993 and equivalent among crops in 1994. The total number of nematodes in the plant-feeder trophic group did not differ before and after incorporation in 1993 and increased for Piper sudangrass, Sordan 79 and P855F sorghum-sudangrass, and sweet corn in 1994. After incorporation, numbers of bacterial-feeding nematodes increased for all crops in 1994 and for Piper sudangrass in 1993. There were no consistent crop treatment effects on the fungal-feeding, omnivore, and predator trophic groups after incorporation. Key words: control, green manure, nematode, organic amendment, potato, Sorghum bicolor, sudangrass, sorghum-sudangrass hybrid.Downloads
Published
Issue
Section
License
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).
