In Vitro Evaluation of Trichoderma and Gliocladium spp. Against Botrytis Corm Rot of Gladiolus

Abstract

The experiment was conducted at the Indian Agricultural Research Institute (IARI) during 1996/97. Antagonistic activity of nine species of Trichoderma and four species of Gliocladium were tested In Vitro. Among seventeen fungi and an actinomycete tested against Botrytis gladiolorum, corms rot of gladiolus showed the extent of inhibition of the mycelial growth of the pathogen. The largest clear inhibition zone (63.4%) was produced by G. virens, whereas G. catenulatum produced contact inhibition and the rest of the antagonists checked 58 to 76% of inhibition of the mycelial growth of B. galdiolorum. Culture filtrates of T. reesei, T. viride and T. harzianum were also found most effective checking the mycelial growth of the pathogen