Managing Resistance of <i>Venturia ineaqualis</i> to the Strobilurin Fungicides

Fig. 2. Frequency distribution of trifloxystrobin sensitivities of Venturia inaequalis isolates for a composite baseline population never treated with trifloxystrobin (solid bars; n=195; mean relative growth = 3.2) and for the population at an experimental McIntosh orchard (hatched bars; n=62; mean relative growth = 23.1). Mean relative growth (RG) = growth amended/growth unamended × 100 at a discriminatory dose of 0.02 µg/ml trifloxystrobin.

Image from Plant Health Progress article:
Managing Resistance of Venturia ineaqualis to the Strobilurin Fungicides