Occurrence and distribution of Colletotrichum disease of cocoa in South India [Theobroma cacao; fungal disease]
1983
Chandra Mohanan, R. | Kaveriappa, K.M.
Among the diseases of cocoa recorded fron India, only Phytophthora diseases, leaf spot and pod rot and charcoal pod rot were found to be the major ones. Leaf blight was found in all the districts surveyed. Shot hole was not observed in Alleppey and Idukki districts of Kerala and Bangalore and Tumkur districts of Karnataka. Irregular leaf spot was observed in three districts of Karnataka. Pod rot was found in all the districts surveyed except Idukki district. Out of 101 gardens surveyed the frequency of occurrence of leaf blight was maximum (78%) followed by shot hole (42%) and irregular leaf spot (12%). Pod rot was noticed in 60% of the gardens surveyed. The distribution of disease symptoms was also found to be affected by cropping patterns. Incidence of foliar symptoms and pod rot was more in gardens of lower altitudes (0-120 m). Colletotrichum disease of cocoa, except irregular leaf spot, is widespread in the major cocoa growing areas and is likely to occur in epiphytotic proportions in the near future
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