Interaction of putative virulent isolates among commercial varieties of mango under protected condition

Abstract

The present study was undertaken to know the interaction of the putative Colletotrichum gloeosporioides isolates from different regions of Karnataka. The cultural characteristics among the 10 isolates studied, showed that isolates Cg-1, Cg-2, Cg-4, Cg-5, Cg-6, Cg-7, Cg-8, Cg-10 were circular with smooth margin both on 7th and 12th day of inoculation. Excellent sporulation was observed in Cg-8 and Cg-4 isolate, good sporulation was observed in Cg-3 and Cg-9 isolates whereas, medium sporulation in Cg-1, Cg-2, Cg-5, Cg-6 and Cg-7 isolates and poor sporulation was observed in Cg-10 isolate. Among the varieties tested, none of them showed immune and resistant reaction to the disease under shade house condition. Dasheri (20%) exhibited moderately resistant reaction, Totapuri (28%) and Himayudhin (29.70%) exhibited moderately susceptible reaction whereas, Mallika (35%) and Kesar (47.30%) exhibited susceptible reaction. Alphanso (62.50%), Neelam (56.20%) and Raspuri (75%) exhibited highly susceptible reaction.