Ecofriendly management of fungal antagonistic Trichoderma sp. against charcoal rot of sunflower caused by Macrophomina phaseolina (Tassi) goid

Abstract

Sunflower (Helianthus annus L.) is one of the most important oil seed crops grown all over the India. Charcoal rot caused by Macrophomina phaseolina is a major disease causing severe yield loss upto 52 per cent.The pathogen invasion occurs from the seedling to maturity stage. To overcome these problem In vitro, sensitivity of M. phaseolina determined through inhibition zone technique to seven isolates offungi antagonistic viz.,Tv1, ETv2, EDTv3, ATv4, CTv5, MTv6andKTv7amended into PDA medium on seven days after inoculation. All the antagonists reduced the colony growth of M. phaseolina significantly compared to the control. Among this isolates Tv1 was effective (74.12%) in reducing the colony growth of M. phaseolina followed byCTv5(68.39), EDTv3 (48.36)respectively over control.