NATURAL OCCURRENCE OF NEMATODE ANTAGONISTIC FUNGI IN TEMPERATE VEGETABLE PRODUCTION SYSTEMS
The study on the occurrence and impact of native antagonistic fungi on the root knot nematode, Meloidoyne hapla in Nilgiris revealed that the most common antagonistic fungi associated were Trichoderma viride,Paecilomyces lilacinus and Verticillium lecanii. The fungal culture filtrates were tested for their larvicidal and ovicidal properties in vitro. The antagonistic effect of these fungi on nematode was further confirmed in vivo under green house conditions. Both in vitro and in vivo studies revealed that T. viride and P. lilacinus were the most effective species against M. hapla.The egg parasitic fungus completely parasitized the eggs and depleted the egg content. The mortality of the juveniles increased with increase in the concentration and exposure to fungal culture filtrates. In vivo studies indicated that these fungi were highly effective in reducing the population of root knot nematodes in soil. The results suggest that these fungi can be effectively used.
Antagonistic fungi; carrot; root knot nematode
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