STUDIES ON BACTERIAL SPOT OF BELL PEPPER (Capsicum annuum L.) CAUSED BY Xanthomonas campestris pv. vesicatoria (Doidge) Dye

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dc.contributor.advisorGUPTA, S.K.
dc.contributor.authorPRASHAD, DURGA
dc.date.accessioned2017-02-16T06:57:52Z
dc.date.available2017-02-16T06:57:52Z
dc.date.issued2009
dc.description.abstractABSTRACT Bacterial spot (Xanthomonas campestris pv. vesicatoria (Doidge) Dye) is an important disease of bell pepper in mid hills of Himachal Pradesh. Present investigations were undertaken with an objective to study the occurrence of the disease, role of abiotic environmental factors in disease development and to devise suitable disease management strategies. The disease was found to occur in moderate to severe form in different bell pepper growing areas of Solan, Shimla and Sirmour districts of Himachal Pradesh. Based on morphological, cultural and biochemical characters, the identity of the pathogen was confirmed to be Xanthomonas campestris pv. vesicatoria (Doidge) Dye. Optimum growth of the pathogen was obtained at 30o C and pH 7.0. Nutrient sodium chloride broth favoured maximum growth of the bacterium. Moderate temperatures (25 + 1o C) coupled with high relative humidity (80%) were found to favour the disease development. Two lines viz., Feroz and EC-57997 were found moderately resistant while eight lines viz., Selection 17-1-2, Kanauri, SP-628, Midway, EC-57996, Navgaon Collection, Nishant and KTCPH-7 exhibited moderately susceptible reaction under natural epiphytotic conditions. Among five biocontrol agents evaluated, only Pseudomonas fluorescens inhibited the growth of bacterium under in vitro conditions. Aqueous extracts of Allium sativum and Curcuma longa inhibited the growth of the bacterium under in vitro conditions. Foliar sprays of combination of streptomycin sulphate (0.01%) + copper oxychloride (0.25%) and streptomycin sulphate (0.01%) alone resulted in minimum disease severity and maximum fruit yield.en_US
dc.identifier.other47071
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810001185
dc.keywordsBacterial spot (Xanthomonas campestris pv. vesicatoria (Doidge) Dye),disease, bell pepperen_US
dc.language.isoenen_US
dc.publisherUHF,NAUNI,SOLANen_US
dc.subPlant Pathologyen_US
dc.subjecteconomics, biological phenomena, resins, productivity, technological changes, exhibitions, developmental stages, marketing, biological development, selectionen_US
dc.themeBacterial spot (Xanthomonas campestris pv. vesicatoria (Doidge) Dye),disease, bell pepperen_US
dc.these.typeM.Scen_US
dc.titleSTUDIES ON BACTERIAL SPOT OF BELL PEPPER (Capsicum annuum L.) CAUSED BY Xanthomonas campestris pv. vesicatoria (Doidge) Dyeen_US
dc.typeThesisen_US
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