Abstract
Significant reduction was observed in the population of plant-parasitic nematodes, Meloidogyne incognita, Rotylenchulus reniformis and Tylenchorhynchus brassicae infesting eggplant and cauliflower when given root-dip treatment in the leaf extracts of Argemone maxicana and Solanum xanthocarpum at different concentrations and dip durations. The root-knot development and larval penetration of second stage juveniles of M. incognita were also inhibited, may be due to bare-root dip treatment in leaf extracts of both the weed plants. Leaf extracts of S. xanthocarpum caused more inhibition in root-knot development, nematode multiplication of reniform and stunt nematodes than that of A. maxicana. Plant growth improvement was noted which seems to be due to dip treatment and reduction in the population of parasitic nematodes. The efficacy of root-dip treatment with respect to improvement in plant growth of eggplant and cauliflower and reduction in root-knot development and nematode population, increased with increasing the concentration of leaf extracts and dip durations.
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