Disease assessment key for bacterial black spot of mango

Abstract

In the present investigation, experiment was conducted to develop an assessment key for evaluating the bacterial black spot incidence and per cent disease index on each twenty different mango cultivars. The study was conducted in randomized block design with three replications during cropping season 2013 and 2014. The incidence of disease was more in the commercially successful variety like Langra (6.80%) and was minimum in local variety Gulabkhas (3.56%) in both the years. The maximum PDI was found in cultivar Langra (1.14%), while minimum PDI was observed in cultivar Gulabkhas (0.76%) in both the years. The study indicated that during both the years of study the commercially grown cultivars like Langra was found to be more susceptible, and the local cultivar Gulabkhas was least susceptible indicating the role of local cultivars in incorporating bacterial black spot resistance in future mango breeding programme.