Journal of Biological Control

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Investigations were conducted on the management of the ischolar_main-knot nematode, Meloidogyne incognita (Kofoid and White, 1919) Chitwood, 1949 infecting crossandra, by integrating the use of two biocontrol agents viz., Paecilomyces lilacinus (Thom.) Samson and Verticillium lecanii (A. Zimmerman) Viegas with leaf extracts of castor and neem (5% each) as bare ischolar_main dip and soil drench. Combinations of V. lecanii and P. lilacinus (2 × 104 spores/ml each) with 5% neem leaf extract resulted in significantly higher plant growth parameters and flower yield. Root gall index was least under V. lecanii plus neem leaf extract (5%) combination followed by V. lecanii plus castor leaf extract (5%). The per cent egg and egg mass parasitization were higher in P. lilacinus than in V. lecanii when they were employed singly without any leaf extract combinations. However, integration with castor leaf extract enhanced the fungal parasitization by P. lilacinus more than that by V. lecanii. Integration with neem leaf extract improved the parasitization by V. lecanii more than that by P. lilacinus.

Keywords

Bare Root Dip, Castor, Crossandra, Leaf Extracts, Meloidogyne incognita, Neem, Paecilomyces lilacinus, Soil Drench, Verticillium lecanii.
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