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Item Screening of betelvine cultivars for host resistance against leaf spot pathogn Xanthomonas Betlicola Patel, Kulkarni and Dhande(Kerala Agricultural University, 1981) Koshy Abraham; James MathewSeven cultivars of betelvine were screened for host resistance against the the leaf spot pathogen Xanthomonas betlicola. The study revealed that none of the cultivars were absolutely resistant to the disease, but the minimum disease severity was observed in the cultivar Tulasivettila. The minimum defoliation within 20 and 30 days after inoculation were observed in the cultivars Karilanchikarpuran and Tulasivettila.Item Control of bacterial leaf spot of betel vine(Kerala Agricultural University, 1982) Koshy Abraham; James MathewIn the in vitro screening of antibiotics, chloramphenicol, Terramycin, Streptomycin, Streptocycline and Agrimycin-100 have showed inhibitory effect to X. campestris pv. betf/cota. Among these, chloramphenicol at 500 ppm exerted maximum inhibitory effect. None of the antibiotics tested in in vivo gave absolute control of the disease. But minimum percentage index of disease status and maximum percentage survival of diseased leaves were observed in plants receiving Terramycin 500 ppm spray.Item On the physiological variation of xanthomonas campestris Pv.betlfcola (Patel, Kulkarni and Dhande) dye(Kerala Agricultural University, 1983) Koshy Abraham; James MathewItem New bacterial wilt of Coleus Vettiveroides Jacob(Kerala Agricultural University, 1992) Estelitta, S; Beena, S; Koshy Abraham; Ravi, S; Varadarajan Nair, PItem Bacterial wilt of pumpkin (Cucurbita Moschata Poir) and snakegourd (Trichosanthes Anguina L.) incited by pseudomonas solanacearvm (Smith) smith from India(Kerala Agricultural University, 1994) Sally K Mathew; Beena Baby, S; Lissy Markose; Koshy AbrahamItem Collar rot of Murraya koenigh L. by corticium rolfsii curzi(Kerala Agricultural University, 1994) Anita Cherian, K; Beena, S; Koshy AbrahamItem Cylindrocladium leaf blight of Acacia auriculjformis A. cunn(Kerala Agricultural University, 1996) Koshy Abraham; Beena, S; Anitha Cherian, K; Sally K MathewItem New leaf spot disease of kodampuli (Garcinia cambogia) desr.(Kerala Agricultural University, 1996) Anita Cherian, K; Beena, S; Koshy Abraham