Abstract

Strobilurins are new class of fungicide with an unique mode of action, effective in altering the physiological and biochemical traits of crop plants. An experiment was conducted to study the influence of strobilurin compounds on nitrate reductase, indole acetic acid oxidase enzymes and total phenolics of chilli. Combined application of strobilurin with triazole compound in the form of Nativo (trifloxystrobin + tebuconazole) @ 400 g ha-1 recorded significantly higher NRase activity and total phenolics content compared to control and other treatments. It is also observed that the combined application of pyraclostrobin with metiram as Cabriotop @ 1500 g ha-1 recorded the maximum IAA oxidase activity.

Keywords: Chilli, Strobilurins, NRase, IAA oxidase, Total phenolics.