Sensitivity assessment and <scp>SDHC‐I86F</scp> mutation frequency of <i>Phakopsora pachyrhizi</i> populations to benzovindiflupyr and fluxapyroxad fungicides from 2015 to 2019 in <scp>Brazil</scp>

Abstract

The present work provides an overview of a large sampling size of P. pachyrhizi populations and their performance over the four crop seasons. The high frequency of SDHC-I86F mutation and low sensitivity to SDHIs are widely distributed in the main soybean growing regions in Brazil and present in volunteer plants in the soybean-free period. Further detailed studies are needed to identify novel point mutations affecting the effectiveness of SDHIs. © 2021 Society of Chemical Industry.