Effect of fungicides on mycelial growth and morphogenetic pathway of Colletotrichum truncatum

Abstract

Genus Colletotrichum attacking over 3,200 species of monocot and dicot plants. During the field survey in kharif 2017-18, Colletotrichum spp. will be isolated from naturally infected soybean pods collected from different locations of Raipur (C.G.). Most characteristic symptom is the development of black fruiting structures (pycnidia) of the fungus arranged in linear rows on the stems, petioles, and pods. In vitro evaluation of hexaconazole, NF, thifluzamide and azoxystrobin were highest percent inhibition of 60% at 50 ppm of NF and lowest percent inhibition of 19.5% at 500 ppm of azoxystrobin. In case of interference of fungicides in infective morphogenetic pathway azoxystrobin, thifluzamide and hexaconazole completely inhibited spore germination at all the concentrations except 50 ppm of NF and thifluzamide.