Population Development and Pathogenicity of Meloldogyne javanica on Flue-cured Tobacco as Influenced by Ethoprop and DD

Authors

  • J. R. Rich
  • C. Hodge
  • J. T. Johnson

Abstract

Growth of flue-cured tobacco as influenced by Meloidogyne javanica and the effectiveness of DD and ethoprop to manage this nematode were evaluated over two growing seasons. Populations of M. javanica, root galling, plant height, steam crown diameter, whole plant weight, and yield were monitored at approximately 2-week intervals beginning 28 days after transplanting. Treatment influence on nematode population development, root galling, and plant growth generally followed a pattern in descending order of efficacy: DD (187 liters/ha), ethoprop (27, 18, or 9 kg a.i./ha), and control. In all treatments, nearly season-long increases in M. javanica populations and root galling were observed. Correlation coefficients relating nematode populations or root galling to final tobacco yield suggested either method may be used successfully to evaluate nematicide efficacy in research plots. Plant growth parameters most affected by M. javanica in order of decreasing severity were cured leaf yield, whole plant weight, plant height, and stem diameter. Key words: root-knot nematode, nematicides, Nicotiana tabacum.

Downloads

Published

1984-07-15

Issue

Vol. 16, No. 3 (July 1984)

Section

Articles

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).