Efficacy of <I>Trichoderma viride</I> Pers. Gray and Neem Cake Amendment in Different Soils against Blackgram Root Rot Caused by <I>Macrophomina phaseolina</I> (Tassi.) Goid

R. Mohan Babu; K. Seetharaman; E. G. Ebenezar; A. Sajeena

doi:10.18311/jbc/2002/4013

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Authors

R. Mohan Babu
Department of Plant Pathology, Agricultural College and Research Institute (TNAU), Madurai 625 104, Tamil Nadu ,IN
K. Seetharaman
Department of Plant Pathology, Agricultural College and Research Institute (TNAU), Madurai 625 104, Tamil Nadu ,IN
E. G. Ebenezar
Department of Plant Pathology, Agricultural College and Research Institute (TNAU), Madurai 625 104, Tamil Nadu ,IN
A. Sajeena
Department of Plant Pathology, Agricultural College and Research Institute (TNAU), Madurai 625 104, Tamil Nadu ,IN

DOI:

https://doi.org/10.18311/jbc/2002/4013

Keywords:

Bioconrol, Macrophomina phaseolina, Neem Cake, Problem Soils, Trichoderma viride.

Abstract

Studies were conducted in a greenhouse to assess the efficacy of Trichoderma viride Pers. Gray and neem cake in different problems soils viz., sandy, black hard pan, saline, sodic, alkaline, red crusted soil, acid soil and normal soil in suppressing the growth of blackgram root rot pathogen Macrophomina phaseolina (Tassi.) Goid. The biocontrol efficacy of T. viride I₃, plus neem cake application in uninfested soil was the maximum 60 days after inoculation in acid soil which showed the minimum (5.63%) root rot incidence as compared to T. viride I₃, alone (6.44%) and neem cake application alone (7.15%). In infested soil, the T. viride I₃ and neem cake plus pathogen inoculation recorded the minimum (6.47%) disease incidence in acid soil as compared to T. viride I₃, and pathogen inoculation (7.52%), and neem cake application plus pathogen inoculation (8.72%), In uninocuiated control and in inoculated control of acid soil, the root rot incidence was 7.84 and 9.70 percent, respectively.