Survey for grey leaf blight of coconut disease in the southern part of Karnataka
Vishwas Gowda G R, Suresh D Ekabote, H Ravindra, S Onkarappa, Sathish K M
In ancient Indian literatures, Coconut (Cocos nucifera L.) is described as 'Kalpa Vriksha' which means tree which provides all the necessities of life. Among several fungal diseases affecting coconut, grey leaf blight caused by Pestalotiopsis spp., is significant. Symptoms of grey blight characterized as initially minute yellow or brown spots surrounded on the leaflets by a grayish band. Later signs are marked by a grayish center with a dark brown margin and as the disease becomes extreme brown spots coalesce to form blight on the leaves. A roving survey was carried out during 2019-2020 in the southern part of Karnataka to assess the incidence and severity of the grey blight of coconut. The per cent disease index was recorded using 0-9 scale. The study showed that the maximum per cent disease severity was observed in Chikkamagaluru (66.38 %), followed by Chitradurga (55.62%) and minimum per cent disease severity was observed in Shivamogga (51.04 %).
Vishwas Gowda G R, Suresh D Ekabote, H Ravindra, S Onkarappa, Sathish K M. Survey for grey leaf blight of coconut disease in the southern part of Karnataka. International Journal of Ecology and Environmental Sciences, Volume 3, Issue 3, 2021, Pages 226-228