Biological control of tomato collar rot induced by <i>Sclerotium rolfsii</i> using <i>Trichoderma</i> species isolated in Bangladesh

This study evaluated three <i>Trichoderma</i> strains (<i>T. harzianum</i> TR05, <i>T. virens</i> TR06 and <i>T. asperellum</i> TR08) originating from Bangladesh as potential biological control agents against collar rot of tomato under greenhouse conditions. After seed treatment with TR05, a disease incidence of collar rot (5.36%) was lower than for TR06 (34.2%) and TR08 (20.8%). Germination percentage of tomato was highest for TR05 (90.3%). In soil treatment, inoculation with TR08 resulted in the lowest disease incidence (9.78%), and the disease incidence was statistically no different from that for TR05 (16.4%). Thus, TR05 and TR08 have potential as biological control agents of collar rot in tomato.