Molecular Mechanisms and Biological Characteristics of Field Isolate Resistance to Pyrisoxazole in Liaoning Province.

is a broad-host-range necrotrophic phytopathogen responsible for serious diseases in leading crops worldwide. The novel sterol 14α-demethylase inhibitor (DMI) pyrisoxazole was recently registered for the control of tomato gray mold caused by in China. One hundred fifty-seven isolates of were collected from tomato greenhouses in 14 cities of Liaoning Province from 2016 to 2021 and examined for sensitivity to pyrisoxazole, with a mean EC value of 0.