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

Table 2.

Antifungal activity of metyltetraprole, pyraclostrobin, fluxapyroxad, and prothioconazole‐desthio form against Z. tritici isolates 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
Set 1	S	S	S	0.0038	—	0.0016	—	0.028	—	0.00089	—
Set 15‐1	R	S	R	0.0047	1.3	0.50	306.3	0.042	1.5	0.0045	5.0
Set 15‐2	R	S	R	0.0025	0.7	0.45	273.6	0.018	0.7	0.0072	8.1
Set 15‐3	R	R	R	0.0047	1.3	0.31	187.9	0.57	20.2	0.058	65.5
Set 15‐4	R	R	R	0.0055	1.5	0.37	225.8	0.50	18.0	0.019	21.3
Set 15‐5	S	S	R	0.0088	2.3	0.0016	1.0	0.021	0.75	0.021	23.4

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 Set 1 (reference) strain.