Use of Chitin for Controlling Heterodera avenae and Tylenchulus semipenetrans

Authors

  • Y. Spiegel
  • E. Cohn
  • I. Chet

Abstract

The nematicidal effect of chitin, relative to other pesticides, was evaluated against two plant-parasitic nematodes, Heterodera avenae and Tylenchulus semipenetrans. Wheat seedlings, grown in soils artificially or naturally infested with H. avenae, were treated with 0.4% (w/w) ClandoSan (CLA) prepared from crustacean chitin, aldicarb (Temik 15G), or ethylene dibromide (EDB 90EC). The CLA treatment significantly increased wheat straw, ear, and average grain dry weights of nematode-infected plants, compared with the other two treatments. In an experiment covering two consecutive seasons, all three treatments reduced the number of cysts in the soil by 60%. In a one-season experiment, CLA reduced the number of cysts by 51% and aldicarb or EDB reduced cyst number by about 40%. A reduction of 50-90% in T. semipenetrans population densities on roots of two citrus rootstocks was recorded following an application of 0.2% (w/w) CLA to the soil. Key words: cereal cyst nematode, chitin, citrus, citrus nematode, control, Heterodera avenae, Triticum aestivum, Tylenchulus semipenetrans, wheat.

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Published

1989-07-15

Issue

Vol. 21, No. 3 (July 1989)

Section

Articles

License

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