Browsing by Author "Gopinathan Pillay, N."
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Item Additional evidence of soil transmission of coconut root (wilt) pathogen(2007-02-08) Shanta, P.; Gopinathan Pillay, N.; Lal, S.B.A sap-transmissible pathogen resembling a virus is associated with the root (wilt) disease of coconut. This pathogen is soil borne. Cowpea plants became diseased when grown in infective soil, or in sterilized soil watered with infective leaf or root sap, or in soil to which infected roots were added. Treatment with pcntachloronitrobenzene destroyed infectivity. Air-drying for more than a week or fine grinding do not destroy infectivity. The pathogen perhaps is released through roots of infected plants. Soil water plays a major part in spread of the disease in nature.Item Additional evidence of soil transmission of coconut root (wilt) pathogen(1972-07) Shanta, P.; Gopinathan Pillay, N.; Lal, S.B.A sap-transmissible pathogen resembling a virus is associated with the root (wilt) disease of coconut. This pathogen is soil borne. Cowpea plants became diseased when grown in infective soil, or in sterilized soil watered with infective leaf or root sap, or in soil to which infected roots were added. Treatment with pcntachloronitrobenzene destroyed infectivity. Air-drying for more than a week or fine grinding do not destroy infectivity. The pathogen perhaps is released through roots of infected plants. Soil water plays a major part in spread of the disease in natureItem Distribution and intensity of root (wilt) disease of coconut in Kerala(2007) Gopinathan Pillay, N.; Lal, S.B.; Shanta, P.A survey conducted recently to study the distribution and intensity of "wilt" disease of coconut in Kerala revealed its incidence along with leaf rot disease in six districts: Trivandrum, Quilon, Alleppey, Kottayam, ErnakuJam, and Trichur. In the north, the disease occurred upto Ala, Varan-darappally, and Kalloor of Trichur District. In the south, palms in Nemum, Ottassekharamangalam, and Maranelloor were infected. Earlier reports of-the disease were confined to gardens between Quilon and Vamanapuram in the south and Ochenthuruthy and Malayatoor in the north. Sporadic occurrence of this disease was also noticed in Kulasekharam and Vailom villages of Tamil Nadu. The spread was faster, more conspicuous, and rampant in sandy, sandy learn, and clayey soils and on the banks of rivers and canals. Intensity of disease was higher in sandy, sandy loam, and clayey soils than in laterite soils. Over 2-5 lakhs hectares of coconut plantations in Kerala are estimated to be affected by this disease.Item Distribution of root (wilt) pathogen in developing seed coconuts(2007-02-08) Gopinathan Pillay, N.; Shanta, P.; Lal, S.B.Item Distribution of root (wilt) pathogen in developing seed coconuts(1970-04) Gopinathan Pillay, N.; Shanta, P.; Lal, S.B.