. 2019 Jan 17;75(4):1181–1189. doi: 10.1002/ps.5288

Table 3.

Antifungal activity of metyltetraprole, pyraclostrobin, fluxapyroxad, and prothioconazole‐desthio against isolates of P. teres with resistance to several groups of fungicide

	Sensitivity^a			Metyltetraprole		Pyraclostrobin		Fluxapyroxad		Prothioconazole‐desthio
Strain	QoI	SDHI	DMI	EC₅₀ ^b	RF^c	EC₅₀	RF	EC₅₀	RF	EC₅₀	RF
Pt 6	S	S	S	0.007	—	0.002	—	0.009	—	0.007	—
Pt 15‐1	R	S	R	0.013	1.9	0.029	14.5	0.007	0.8	0.044	6.3
Pt 15‐2	S	R	R	0.015	2.1	0.002	1.0	0.748	83.1	0.067	9.6
Pt 15‐3	S	S	R	0.009	1.3	0.003	1.4	0.010	1.1	0.131	18.8
Pt 17‐1	R	S	R	0.011	1.6	0.033	16.5	0.011	1.2	0.073	10.4

Sensitivity/resistance. R, resistant strain; S, sensitive strain.

Mean of four independent EC₅₀ values (mg L⁻¹).

Resistance factor is the ratio of EC₅₀ of the resistant strain to that of the reference strain.