In vitro screening of Trichoderma spp. for their antagonism against soil-Borne fungi

Abstract

In vitro efficacy of twenty five Trichoderma isolates, out of which twenty were TCMS series (TCMS 2, 4, 5, 14a, 14b, 15, 16, 24, 32, 34, 36, 43, 60, 62, 64, 65, 72, 85 and 93) and five Th series (Th 1, 3, 14, 19 and 32) were ascertained for their antagonistic potential against soil-borne plant pathogenic fungi namely, Sclerotinia sclerotiarum, Colletotrichum capsici, Rhizoctonia solani and Fusarium oxysporum which were isolated from infected brinjal, capsicum, rice and tomato. Most of the tested Trichodrma isolates were observed to be significantly inhibited the radial growth of the fungi. Hundred % inhibition of R. solani was observed by TCMS-2, 4, 5, 12, 14a, 14b, 15, 16, 32, 36, 43, 62, 65 and 93 after 72 hrs of incubation. Maximum inhibition of C. capsici was observed with TCMS-12 and TCMS-32 (77.5%) over check followed by TCMS-36 (76.2%). All the tested Trichoderma isolates were found highly effective against S. sclerotiarum with cent per cent inhibition. Against F. oxysporum TCMS 36 was found most effective with 75.5% efficacy followed by TCMS-43 (73.4%) and TCMS-24 (72.4%) inhibition. These potential isolates could be evaluated further under field level and may be effectively utilized to manage the plant diseases in sustainable manner.