Browsing by Author "Mathew George"
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Item Association of Bacteria in the Etiology of Root(WILT) Disease(Central Plantation Crops Research Institute, Regional Station Kayankulam, 1983) Mathew GeorgeItem Association of Enterobacter with Coconut Root (Wilt) Disease(1976-09) Mathew George; Potty, V.P.; Jayasankar, N.P.Item A bacterial blight disease of cardamom(2007-02-08) Mathew George; Thomas Joseph; Potty, V.P.; Jayasankar, N.P.Item Basin management using green manure legumes for root (wilt) affected coconut palms(1990-03) George V. Thomas; Mathew GeorgeItem Basin management using green manure legumes for root (wilt) affected coconut palms(2007-02-08) George V. Thomas; Mathew GeorgeItem Collateral hosts of Corynebac terium sp. causing chenthal disease of cardamom(2007-02-08) Mathew George; Jayasankar, N.P.Corynebacterium sp. is reported to be involved in the blight of cardamom and symptoms characteristic of chenthal disease were observed on certain wild species of zinziberaceae. The host range of the bacterium was studied with respect to eight species after spraying the bacterial suspension. Curcuma angusttfoHa did not exhibit any symptoms. Mitd infection was noted on Alpinia galange. Water soaked lesions were observed on Aframomum maJequeta and Zingiber officinale.Item Control of Chenthal (bacterial blight) disease of cardamom with penicillin(2007-02-08) Mathew George; Jayasankar, N.P.Item Distribution and factors influencing chenthal disease of cardamom(2007-02-08) Mathew George; Jayasankar, N.P.'Chenthal' is a newly reported disease of cardamom caused by Corynebacterium sp. The symptoms of the disease are delineated. Water-soaked lesions appeared on the abaxial surface of the young leaves turn brown to dark in colour and the leaves wither. As withering of the leaves progresses the plants wilt. Affected gardens present a burnt appearance. Report on a comprehensive survey of Chenthal disease reveals that the entire cardamom belt of Kerala is affected and the disease has extended to patches of Tamil Nadu and Karnataka States too. It is noteworthy that pockets of healthy plantation exist within the foci of severe infestation. Occurrence of healthy plantation cut away from the main belt of cardamom growing areas is also observed. Analysis of the survey data reveals a highly significant correlation between manuring and incidence of the disease. Significant correlation is found between shade and intensity of the disease also. Based on these points, the probable chances of arresting the disease by ecological manipulation and suitable management practices is discused. An explanation to the severity of Chenthal disease in red gum tree shade is also attempted.Item Effect of crop mixing on the coconut Rhizosphere(2007-02-08) Potty, V.P.; Mathew George; Jayasankar, N.P.Item Effect of growing green manure legumes in the basins of root (wilt) affected coconut palms(2007-02) George V. Thomas; Mathew George; Shantaram, M.V.Item Etiology and control of Chenthal disease of cardamom(2007-02) Mathew George; Jayasankar, N.P.Item Microbial Degradation of Coconut Waste Materials(2007-02) Potty, V.P.; Joseph, K.V.; Mathew George; Jayasankar, N.P.Retting of coconut husk yields coir fibre and coconut pith both of which are resistant to microbial attack. The former finds a place in commerce, while the disposal of the latter is a problem. Enrichment culture methodology using lignocellulose as source of carbon yielded a fungus identified as Poria ravanulae. The fungus could utilise coconut pith which is essentially a ligno cellulose complex, as source of carbon for its growth. The coconut P. ravanulae isolates were lignoclastic, its polyphenol oxidase was noninducible and could use a range of phenolic substrates for growth. Replacement culture techniques indicated the conversion of trihydric phloroglucinol to dihydric resorcinol.Item Microbiological Aspects(2007-02) Jayasankar, N.P.; Joseph, K.V.; Mathew George