Quizalofop-p-ethyl Mixed with Synthetic Auxin and ACCase-Inhibiting Herbicides for Weed Management in Rice Production

Table 3

Red rice control with quizalofop-p-ethyl mixed with different synthetic auxin or ACCase-inhibiting herbicides in 2015 and 2016 crop seasons.

Mixture herbicide^a	Rate (g ai·ha^−1)	Quizalofop (g ai·ha^−1)			value^c
		0	120
		Observed	Expected	Observed^b
		% Control
14 DAT
None	—	0	—	94	—
2,4-D	1336	0	94	51−	0.0001
Quinclorac	420	0	94	85	0.0799
Triclopyr	282	0	94	85	0.1079
Cyhalofop-butyl	314	0	94	88	0.2710
Fenoxaprop-p-ethyl	122	0	94	86	0.1188
28 DAT
None	—	0	—	99	—
2,4-D	1336	0	99	37−	0.0001
Quinclorac	420	0	99	96	0.6405
Triclopyr	282	0	99	93	0.3031
Cyhalofop-butyl	314	0	99	98	0.8440
Fenoxaprop-p-ethyl	122	0	99	94	0.3770

^aEvaluation date and respective herbicide mixture. DAT, days after treatment. ^bObserved means followed by a plus (+) or a minus (−) are significantly different from Blouin’s modified Colby’s expected responses at the 5% level indicating a synergistic or an antagonistic response. No (+) or (−) indicates a neutral response. ^c indicates antagonistic response; indicates an additive response.