Efficacy of Fungicide against Colletotrichum lagenarium inciting anthracnose of bitter gourd

Abstract

In vitro efficacy of fungicides were assessed against Colletotrichum lagenarium causing anthracnose of bitter gourd using Poison Food Techniques. All seven systemic fungicides tested at 500 and 1000 ppm were significant in recording minimum mycelial growth and maximum inhibition of C. lagenarium over the control. Among systemic fungicide, Carbendazim 50% WP showed no mycelial growth. Propiconazole was second best treatment and recorded least mycelial growth and as compared to control followed by Tebuconazole, Thiophanate methyl, Difenconazole, Dimethomorph and Azoxystrobin at all tested concentration. Seven contact and combi fungicides were also found effective over control recording least mycelial growth and maximum inhibition. Carboxin 37.5% + Thiram 37.5% and Tebuconazole 50% + Trifloroxystrobin 25% WG completely inhibited the growth of pathogen. whereas Azoxystrobin 11% + Tebuconazole 18.3% SC was next best treatment in recording least mycelial growth and highest per cent inhibition of growth followed by Tebuconazole 67% + Captan 26.9% SC and Chlorothalonil 75% WP over control.