In vitro efficacy of fungicides, bio-agents and phyto-extracts against Colletotrichum truncatum

Abstract

Soybean [Glycine max (L.) Merrill] is one of the most important oilseed crop in India as well as in the World belonging to family leguminoceae. Colletotrichum truncatum, the causal organism of anthracnose/ pod blight of soybean is one of the destructive pathogen. Seven systemic fungicides (@ 500, 1000 ppm each), seven bio-agents and seven botanicals @ 10% and 20% each were evaluated in vitro against C. truncatum using PDA as basal medium. The results revealed that all the fungicides, bio-agents and botanicals were found fungistatic and significantly inhibited the mycelial growth of the test pathogen over control. Among the fungicides, carbendazim and propiconazole recorded highest mean inhibition (96% @1000 ppm and 94.33% @ 500 ppm) of mycelial growth of the test pathogen. Among phyto-extracts tested, garlic extract recorded highest mean inhibition (79.66 @10% and 87.33 @20%) of mycelial growth of the test pathogen. Among bio-agents tested, Trichoderma asperellum recorded highest mean mycelial inhibition (74.88) of the test pathogen.