Fungicide Resistance Among <i>Botrytis cinerea</i> Isolates from California Strawberry Fields

Fig. 1. Example of agar diffusion assay. Left plate shows clear inhibition zone by fenhexamid (Elevate) at 10 ppm (mg/liter) but not at 2.5 and 5 ppm. Right plate shows isolate insensitive to thiophanate-methyl (Topsin) at both 10 and 50 ppm, comparable to the water control.



Image from Plant Health Progress article:
Fungicide Resistance Among Botrytis cinerea Isolates from California Strawberry Fields