In Vitro Screening Of Antagonistic Trichoderma Spp. Isolates Against Macropomina Phaseolina Volume-4-Issue-1 M. MAHENDRA, M. REDDI KUMAR*, C.P.D. RAJAN AND P. SUMATHI In Vitro Screening Of Antagonistic Trichoderma Spp. Isolates Against Macropomina Phaseolina 1 Department of Agronomy, S.V. Agricultural College, ANGRAU, Tirupati – 517 502, Chittoor Dt., Andhra Pradesh , . 1 2Bamrasnaradura Infectious Diseases Institute , School of Life Science and Technology , Institut Teknologi Bandung (ITB) , Institut Teknologi Bandung (ITB) , Jalan Ganesha No. 10 Bandung , Nonthaburi , 11000 , Thailand . 10.22207/JPAM.12.2.01 Volume 1 Issue 1 Abstract

Six isolates of Trichoderma spp. were tested for their antagonist potential against four isolates of M. phaseolina, incitant of groundnut dry root rot by following dual culture technique in vitro. Among all the isolates of Trichoderma, GRT5 shown highest (59.48%) mean inhibition followed by GRT2 (59.38%), GRT1 (59.27%) and GRT4 (58.96%). From the above study top four isolates of Trichoderma spp. which showed maximum mean inhibition per cent when dual cultured with four isolates of M. phaseolina viz., GRT5, GRT2, GRT1 and GRT4 were considered as effective Trichoderma isolates and one isolate of patho-gen i.e., SmMp was considered as a more virulent pathogen which exhibited lowest mean percent inhibition (56.81%) in dual culture.

Keywords Tricoderma spp. M. Phaseolina Dual culture Inhibition percent and Dry root rot References