Dynamics of soil nematodes in vegetable based crop sequences in West Bengal, India
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Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia-741235, India
Matiyar Rahaman Khan
Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia-741235, India
Journal of Plant Protection Research 2011;51(1):7–13
Diversity and dynamics of soil nematodes were observed in okra based crop sequences in West Bengal, India. The major nematode species identified were: Rotylenchulus reniformis, Meloidogyne incognita, Hoplolaimus indicus, Tylenchorhynchus mashhoodi and Criconemoides onoensis . R. reniformis and M. incognita were found to be the most abundant. The okra-cowpea-cabbage and okra- cucumber-mustard sequences were found to have maximum suppressive effect on M. incognita . The cabbage, mustard and rice in the sequence had a suppressive effect on M. incognita while okra, brinjal, cowpea and tomato supported nematode multiplication. Okra-rice-fallow suppressed R. reniformis. Low populations of H. indicus and C. onoensis were found in okra-cowpea-cabbage, okra- brinjal-okra and okra-cucumber-mustard. The populations of H. indicus and C. onoensis were found maximum in okra-rice-tomato and okra-rice-fallow. T. mashhoodi was suppressed under okra-cowpea-cabbage, okra-rice-fallow, okra-cucumber-mustard and okra- brinjal-okra. Plant parasitic and free living nematodes in an okra based system were estimated and their ratio was determined. The saprozoic nematode index (SNI) was found high (0.45) in okra-rice-fallow.
The authors have declared that no conflict of interests exist.
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