Use of chitin for controlling plant plant-parasitic nematodes |
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Authors: | Y Spiegel I Chet E Cohn |
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Institution: | (1) Department of Nematology, ARO, The Volcani Center, P. O. B. 6, Bet Dagan;(2) Department of Plant Pathology and Microbiology, The Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot, Israel |
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Abstract: | Summary Bean and tomato seedlings, treated with different amounts of ammonia and chitin, and inoculated with the root-knot nematode,Meloidogyne javanica, were reared in two consecutive 35-day growth of shoot and root and the condition of the root systems of both plant species
and degree of infection byM. javanica were decreased by increasing amounts of ammonia. Chitin caused a relatively small reduction in gall formation but almost
no changes in fresh shoot weights.
The effect of chitin on plant growth and nematode attack were also compared in irradiated and non-irradiated soil. In the
first cycle galling index of the chitin treated plant was similar to that of untreated plants maintained in the irradiated
soil conditions, while in the non-irradiated soil, chitin treatment reduced galling index. In the second cycle, chitin treatment
reduced galling index in both irradiated and non-irradiated soils, especially in the latter, where galling index greatly decreased
compared with the non-treated plants. Differences in fresh shoot weight between nematode-infected and nematode-free plants
amended with chitin were greater under non-irradiated than irradiated conditions, especially in the second cycle. In non-irradiated
soil, a higher level of chitinolytic microorganisms, particularly actinomycetes, was found in the second cycle.
Contribution from the Agricultural Research Organization (ARO), Bet Dagan, Israel. No. 1520-E, 1985 series. |
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Keywords: | Actinomycetes Ammonia Chitin Meloidogyne javanica Mode of action Nematode |
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