Comparative phytotoxicity of nitrapyrin and ATC to several leguminous species |
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Authors: | M Maftoun J Yasrebi M Darbeheshti |
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Institution: | (1) Department of Soil Science, College of Agriculture, Shiraz University, Shiraz, Iran |
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Abstract: | Summary The relative toxicity of nitrapyrin 2-chloro-6-(trichloromethyl) pyridine and ATC (4-amino-1, 2, 4-triazole) on the growth
of chick peas (Cicer arietinum L.) cow peas (Vigna sinensis L.), green beans (Phaseolus vulgaris L.), green peas (Pisum sativum L.) and mung beans (Phaseolus aureus Roxb.) and their effectiveness as nitrification inhibitor were studied under greenhouse conditions. ATC produced no toxicity
symptoms in green peas, whereas resulted in leaf chlorosis in cow peas, chick peas and green beans. However, nitrapyrin toxicity
appeared as leaf chlorosis in cow peas, and interveinal chlorosis in chick peas. Moreover, nitrapyrin-treated green beans
and peas developed leaf curling and cupping. Although ATC had no significant effect on growth, a suppression in plant growth
was associated with nitrapyrin application. Furthermore, green beans was the most resistant and chick peas the most sensitive
to nitrapyrin. Nitrapyrin was more effective nitrification inhibitor than ACT, especially at the lower rates. |
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Keywords: | 4-amino-1 2 4-triazole 2-chloro-6-(trichloromethyl) pyridine Interveinal chlorosis Leaf curling |
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