Status of Alternaria blight of watermelon under Rajasthan conditions

Abstract

The incidence and severity of Alternaria blight of watermelon recorded during survey programme is presented in Table1. The data revealed that Alternaria blight of watermelon was present to the varying extents in watermelon fields of above four districts of Rajasthan in which two localities such as Pakka Saharana (Hanumangarh) and Piperan (Sriganganagar) were found free from the incidence of the disease. The disease incidence and disease severity ranged from 13.50-26.50% and 3.0 to 18.50%, respectively. Hightest disease incidence (26.50%) and disease severity (18.50%) were observed at Pathology Block (Beechwal, Bikaner) followed Khejroli (Chomu, jaipur), 25.50% and 12. 0%, respectively. The disease incidence (13.50%) and disease severity (3.0%) were found lowest at locality Khara Bikaner. The district wise average disease was observed highest (10.92%) in Bikaner district, while minimum disease severity (5.58%) was found in Hanumangarh followed by Sriganganagar (5.67%).