Vol. 11, Special Issue 2 (2022)

Author(s):
Poonam Kumari, Lokesh Kumar, Ranjana Meena, Sunita Choudhary, Pinki Devi Yadav and Monika Meena

Abstract:
Studies were undertaken for Management of Alternaria leaf spot of Asalio Caused by Alternaria alternata. The disease was observed to exhibit an increasing trend in Asalio growing areas. The study was carried out to identification of pathogen and find out the association between weather factors and disease severity. A. alternata is a primary pathogen in Asalio, causing a leaf-spot disease. These culture of pathogen was identified by to "Indian Type Culture Collection Identification/Culture supply Services, Division of Plant Pathology, Indian Agricultural Research Institute, New Delhi-110012" as Alternaria alternata and observed the influence of weather factors on disease development. weather factors (temperature and relative humidity) had direct and significant influence on the disease incidence and disease progress. Maximum incidence of Alternaria leaf spot disease was observed at moderate temperature 24.0- 26.9 ⁰C and relative humidity 77.3- 78.7% with AUDPC value (area under disease progressive curve) ranging between 114.73 to 483.39 in pot culture. However, still more epidemiological studies are required to strengthen the forecasting and prediction mechanism of the disease which will ultimately minimize the yield losses caused by the disease.