Bio-efficacy of new fungicide Pyraclostrobin 133g/l + Epoxiconazole 50g/l SE against coffee leaf rust disease in hill zone of Karnataka

Abstract

Coffee leaf rust (CLR) is caused by the fungal pathogen, Hemileia vastatrix Berk. & Br. and it is the major disease of coffee in all the coffee growing regions. In the present investigation, evaluation of a new combiproduct fungicide molecule against coffee leaf rust disease was carried out in field conditions during Rabi 2018 and Rabi 2019. The results revealed that, in Rabi 2018 and Rabi 2019, Pyraclostrobin 133g/l + Epoxiconazole 50g/l SE @ 1.50 ml/L showed the least coffee leaf rust disease severity 18.38 PDI and 13.17 PDI respectively which was on par with its higher concentrations (1.75, 3.00 and 4.50 ml/L). Pyraclostrobin 133g/l + Epoxiconazole 50g/l SE @ 1.50 ml/L recorded maximum yield of 690 and 792.66 kg/ha in Rabi 2018 and Rabi 2019 respectively which was on par with other treatments. Pyraclostrobin 133 g/l + Epoxiconazole 50 g/l SE @ 1.5 ml/L can be adopted in spray schedule for integrated disease management of leaf rust (CLR) in coffee.