Estimation of AUDPC (Area under disease progressive curve) of RAB (Rhizoctonia aerial blight) disease for epidemiological studied in soybean crop

Abstract

Rhizoctonia aerial blight is one of the precarious disease of soybean caused by fungus Rhizoctonia solani. In epidemiological studies calculation of AUDPC (Area under Disease Progressive Curve) is one of the important tools to predict the disease development. The study was conducted in year 2017 at G.B.P.U.A.T, Pantnagar, and Uttarakhand. Sixteen cultivars of soybean were studied against the disease. The base for calculation of AUDPC was disease rating. September and October were most favorable months for the initiation and development of disease. Disease progressive curve increase exponentially from the disease initiation (37th SMW) till (42th SMW). AUDPC is a useful tool for quantitative measure of disease intensity over time.