Journal of SOIL BIOLOGY and ECOLOGY

Efficacy of bio-inoculants on the root-knot nematode (Meloidogyne incognita) in black pepper (Piper nigrum L.)

Authors: C.P. MANJULA AND N.G. RAVICHANDRA

Abstract:

Pepper, a vital spice crop, is succumbing to wilt disease caused by root-knot nematode. The disease reduces yield, and also the entire vine collapses gradually. Meloidogyne incognita management was carried out using bio-inoculants (Pochnia chlamydosporia, Pseudomonas fluorescens, Trichoderma viride, T. harzianum and Bacillus macerans) to study their effect on nematode population and yield. During the first year, the effect of P. chlamydosporia was more in controlling the nematode population (112/200cc soil) followed by Ps. fluorescens (172/200cc soil) when compared to untreated control (326/200cc soil). The highest yield was obtained with P. chlamydosporia (1332kg/ha) treatment, followed by T. viride (1226.5kg/ha). Among the bio-agents tested during the second year, P. chlamydosporia (20g/vine) applied plants recorded the least nematode population of 112/200cc of soil, followed by Ps. fluorescens (172/200cc), T. viride (183/ 200cc), neem cake (235/200cc), B. macerans (274/200cc) and T. harzianum (286/200cc) compared to untreated control (326/200cc). The yield was also higher in the vines treated with P. chlamydosporia (1.2kg/vine) compared to control (0.95kg/vine). The best bioinoculant treatment for managing the root-knot nematode in black pepper was P. chlamydosporia (20g/vine with 2X106 spores/g) soil application.

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