Biological control of charcoal rot of sesame caused by Macrophomina phaseolina
BIOLOGICAL CONTROL OF CHARCOAL ROT OF SESAME CAUSED BY MACROPHOMINA PHASEOLINA
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Authors
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PREETI VASHISHT
CCS Haryana Agricultural University, Hisar-125 004, Haryana
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H S SHARAN
CCS Haryana Agricultural University, Hisar-125 004, Haryana
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A S RATHI
CCS Haryana Agricultural University, Hisar-125 004, Haryana
Keywords:
Biological control, Macrophomina phaseolina, Pseudomonas, Sesame, TrichodermaAbstract
The potential of bio-agents for the management of sesame root rot caused by Macrophomina phaseolina was evaluated under in vitro conditions. The isolates of bio-agents used for the management of root rot ofsesame were Trichoderma viride, Trichoderma harzianum and Pseudomonas fluorescens. The growth of T. viride, T. harzianum and P. fluorescens was observed in dual culture. The maximum mycelial growth inhibition was showed by T. harzianum by 66.94% followed by T. viride by 59.9% and then by P. fluorescens by 59.9%. The volatile and non-volatile compounds produced by different bio-agentsinhibited the colony growth of M. phaseolina. Maximum mycelial growth inhibition was showed byT. harzianum by59.4% by the production of volatile compounds followed by T. viride and P. fluorescens. By the production of non-volatile compounds the maximummycelial inhibition was done by T. harzianum by 59.9%, again followed by T. viride and P. fluorescens. Biological control has become an alternate and most important part of plant disease management as chemical pesticides possess harmful effects on environment and human health.
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