Management of Plant-parasitic Nematodes with a Chitin-Urea Soil Amendment and Other Materials


  • B. B. Westerdahl
  • H. L. Carlson
  • J. Grant
  • J. D. Radewald
  • N. Welch
  • C. A. Anderson
  • J. Darso
  • D. Kirby
  • F. Shibuya


Field trials were conducted with a chitin-urea soil amendment and several other nematicides on four crop-nematode combinations: tomato-Meloidogyne incognita; potato-Meloidogyne chitwoodi; walnut-Pratylenchus vulnus; and brussels sprouts-Heterodera schahtii. Significant (P = 0.10) nematode population reductions were obtained with the chitin-urea soil amendment in the trims on potato and walnut. In the trials on brussels sprouts and on tomato, phytotoxicity occurred at rates of 1,868 and 1,093 kg/ha, respectively. Significant (P = 0.10) nematode reductions were also obtained with metham sodium on potato; with 1,3-D on tomato and brussels sprouts; and with sodium tetrathiocarbonate, XRM 5053, fenamiphos, ethoprop, LX1075-05, LX1075-07, and SN 109106 on tomato. The following materials did not provide significant nematode control under the conditions of the particular experiments: metham sodium, oxamyl, and Yucca extract on tomato; and dazomet granules on brussels sprouts. Key words: Brassica oleracea gemmifera, brussels sprouts, chemical control, Heterodera schachtii, Juglans hindsii, Meloidogyne chitwoodi, M. incognita, nematode, potato, Pratylenchus vulnus, Solanum tuberosum, tomato, walnut.