Table 2.

Effects of two adjuvants on the maximum quantum efficiency (F_v/F_m) of giant foxtail (Setaria faberi Herrm.) at 2–5 days after treatment (DAT).

Days After Treatment (DAT)	Adjuvant	${\mathit{RI}}_{F_v/F_m}$ $R{I}_{F_V}{/}_{F_m}$
		High temperature	Moderate temperature	Low temperature
2	Alone	0.97 ± 0.07aA	0.98 ± 0.04aA	0.99 ± 0.02aA
	Org	0.89 ± 0.13abA	0.95 ± 0.06abA	1.00 ± 0.02aA
	MSO	0.89 ± 0.20bB	0.86 ± 0.08bB	0.99 ± 0.02aA
3	Alone	0.79 ± 0.25aB	0.57 ± 0.19abC	0.96 ± 0.03aA
	Org	0.78 ± 0.20aB	0.60 ± 0.19aC	0.98 ± 0.04aA
	MSO	0.73 ± 0.19aB	0.55 ± 0.16bC	0.96 ± 0.05aA
4	Alone	0.56 ± 0.26aB	0.32 ± 0.09aC	0.68 ± 0.17aA
	Org	0.42 ± 0.21abB	0.36 ± 0.12aC	0.75 ± 0.20aA
	MSO	0.37 ± 0.22bA	0.26 ± 0.07bC	0.54 ± 0.09bA
5	Alone	0.45 ± 0.23aB	0.28 ± 0.08aC	0.49 ± 0.16aA
	Org	0.36 ± 0.17aB	0.23 ± 0.09aC	0.57 ± 0.27aA
	MSO	0.27 ± 0.08bB	0.13 ± 0.04bC	0.39 ± 0.15bA

The topramezone dose was 6.3 g a.i. ha⁻¹; control means treated with tap water; Alone means that topramezone was applied alone; Org means that topramezone was applied with a tank-mix of organosilicone; MSO means topramezone was applied with a tank-mix of MSO. The means in the same column followed by a common letter are not significantly different at p = 0.05 (vertical comparison). The means in the same row followed by a capital common letter are not significantly different at p = 0.05 (horizontal comparison).