ORIGINAL ARTICLE
Dynamics of soil nematodes in vegetable based crop sequences in West Bengal, India
1
Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia-741235, India
Corresponding author
Matiyar Rahaman Khan
Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia-741235, India
Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia-741235, India
Journal of Plant Protection Research 2011;51(1):7-13
KEYWORDS
TOPICS
ABSTRACT
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.
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
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