Abstract
The present study was carried out on broiler chickens maintained at farmer's field under supervision of Krishi Vigyan Kendra, Kotwa, Azamgarh, in 2013. Causative agents were listed and percent mortality was calculated during different seasons, viz. winter, summer and rainy seasons. Broiler chickens (0–8 weeks) were reared in deep litter system of management. The overall mortality pattern during 0–8 weeks revealed the highest mortality (63.53 %) in rainy season, followed by summer (28.88 %) and the lowest (7.58%) in winter. The highest (33.26%) mortality was observed due to omphalitis and significantly (P<0.05) influenced by season. Colibacillosis and Gumboro incidences were also significantly (P<0.05) influenced by season and the overall per cent mortality incidences were 25.45 and 8.87 respectively. Lichi and non specific causes for mortality were 16.88 and 15.51 per cent, respectively. From the present findings, it can be concluded that the Lichi and nonspecific causes of mortality remain higher in rainy season.
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