Abstract
Study on effect of resource conservation practices and conventional practices on population dynamics of Meloidogyne graminicola under rice-wheat cropping system revealed that the fields with the intervention of resource conservation practices showed high population densities, root knot index and narrow nematode to root biomass ratio of M. graminicola as compared to conventional ones. It was also found that those tillage practices where residues were left on the field (with residues) has high population, root knot index and narrow nematode to root biomass ratio as compared to practices where crop were harvested from ground level without leaving residues in the field. Contrarily, zero till rice-zero till wheat + Sesbania sp. showed low population densities, root knot index and wide nematode to root biomass ratio and thus may serve as a better option for the management of M. graminicola. Key words: Meloidogyne graminicola, resource conserving technologies, nematode-to-root biomass ratio, root knot index.
Highlights
The rice-wheat cropping system is the most important food grain production system in India
The resource-conserving technologies (RCTs) such as zeroor no-tillage and reduced tillage systems have been found beneficial in improving soil health, water use, crop productivity and farmers’ income (Gupta and Seth, 2007)
Effect of different tillage practices on development of root knot disease revealed that population of second stage juveniles of M. graminicola at initial stage was found higher in resource conservation practices (768-1030) as compared to conventional practices (65-400) and double zero tillage with sesbania (296) (Table 2)
Summary
Effect of resource conservation practices and conventional practices on population dynamics of Meloidogyne graminicola (Golden and Birchfield, 1965). Study on effect of resource conservation practices and conventional practices on population dynamics of Meloidogyne graminicola under rice-wheat cropping system revealed that the fields with the intervention of resource conservation practices showed high population densities, root knot index and narrow nematode to root biomass ratio of M. graminicola as compared to conventional ones. It was found that those tillage practices where residues were left on the field (with residues) has high population, root knot index and narrow nematode to root biomass ratio as compared to practices where crop were harvested from ground level without leaving residues in the field.
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