and Technology in 2009-10 and were tested following inhibition zone technique in vitro against Ralstonia solanacearum causing bacterial wilt and brown rot of potato. The result indicated that all the aqueous plant extracts exhibited antibacterial property. Maximum zone of inhibition (10mm) was observed in leaf extract of Musa paradisica and flower extract of Nerium indicum while lowest zone of inhibition (6.68mm) was observed in leaf extract of Ocimum sanctum and flower extract of Ixora coccinea

an area of about 159.22 million hectares with 465.81 million tonnes of production and productivity of 4.36metric tonnes per hectare (USDA, 2013). The major rice producing countries are China,

Bacterial wilt and brown rot caused by Ralstonia solanacearum is one of the most dreaded diseases causing 30 to 70% yield loss in India. The disease is both tuber and soil borne. A field trial was conducted following split plot design in the year 2008 to 09 and 2009 to 10 under All India Coordinated Potato Research Project in Central Farm,

No abstract

Potato is one of the most popular vegetable crop of Odisha consumed by all sections of people irrespective of it age. Major contributing factor for reduction of yield in the state is due to occurrence of different diseases at different stages of crop growth. The selection of varieties plays an important role to combat the disease problem. The present studies were conducted in coastal plains of the state on the performance of three popular varieties, i.e., Kufri Chandramukhi, Kufri Ashoka and Kufri Jyoti consecutively for three years from 2005-06 to 2007-08 following standard fixed plot survey method. It is revealed that early blight, late blight, phoma blight, black leg, bacterial wilt, leaf roll, mild mosaic, were commonly occurred in growth stage while brown rot, soft rot and scab were observed at harvest. Among these varieties Kufri Jyoti produced maximum yield (15.01t/h) with least disease incidence followed by Kufri Ashoka (11.63t/h) and Kufri Chandramukhi (12.40t/h) under natural condition.