George, M.V.Thommen, K.J.Sukumaran, A.S.2014-06-262014-06-262007-02In: Proceedings, PLACROSYM II, UPASI, Ootacamund, 26-29 Jun. 1979. Edited by C. S. Venkataram and others 1980 p-517-522http://hdl.handle.net/123456789/3323The root (wilt) disease affected coconut areas in Kerala were surveyed adopting a multistage sampling procedure during 1971 - 76 to estimate the percentage of palms affected by root (wilt) and leaf rot diseases and infested by Oryctes. The incidence of disease was maximum in Alleppey district (54%) followed by Kottayam (50%) and Idikki (43%) districts and minimum in Trichur district (less than 5%) where the disease incidence was limited to the southern villages. The Oryctes infestation was as high as 75 % in Quilon district and 70 % in Alleppey district. It is the lowest in Trichur district (39 %). In other districts the infestation varied from 59% to 66%. The association of Oryctes infestation with these diseases was also discussed.enArticle