Author(s):

Girija Shankar, Kamal Narayan Koshale, Manoj Kumar Sahu and RK Dantre

Abstract: A field experiment was conducted to evaluate the sixteen genotypes for its resistance or response against bacterial pustule disease of soybean during kharif 2014 under natural field condition at AICRP Soybean, College of Agriculture, Raipur (Chhattisgarh). Screening of sixteen genotype of soybean was sown to record the per cent incidence and severity. Results indicated that five genotype viz., JS-72-44, JS-75-46, JS-71-05, JS-335 and Shivalic were free from the disease. Maximum bacterial pustule was recorded in variety Punjab-1 (64.34%) followed by NRC-7 (46.51%) and Monatta (38.73%). Among the sixteen genotypes, eight genotypes exhibited resistant reaction, five genotypes were moderately resistant, reaction and three genotypes showed susceptible reaction, whereas no any genotype have moderately susceptible and tolerant reaction. In correlation studies there was significant positive and negative association of disease spread among the plants with maximum temperature and relative humidity, respectively for all genotypes. Morning vapor pressure was significant and positively correlated with disease spread among the plant for two genotypes viz., NRC-7 and Monatta whereas, rainfall and evening relative humidity was negatively associated with disease spread among the plant for same genotypes. Minimum temperature was significant negatively correlated with disease spread among the plant for all three genotypes. There was non-significant correlation between diseases spread on within the plant and weather parameters except wind velocity which was negatively associated for all three genotypes. Maximum disease spread among the plant was found in genotype between 1^st August to 10^th August, while within the plants maximum progress of disease was found in genotype Monatta between 21^th August to 30^th August.

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