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

Table 2

Barnyardgrass 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	—	91	—
2,4-D	1336	0	91	24−	0.0001
Quinclorac	420	42	95	77−	0.0001
Triclopyr	282	0	91	79−	0.0001
Cyhalofop-butyl	314	75	98	86−	0.0001
Fenoxaprop-p-ethyl	122	72	98	85−	0.0001
28 DAT
None	—	0	—	98	—
2,4-D	1336	36	98	5−	0.0001
Quinclorac	420	59	99	86−	0.0001
Triclopyr	282	39	98	91−	0.0046
Cyhalofop-butyl	314	85	99	97	0.1126
Fenoxaprop-p-ethyl	122	75	99	90−	0.0001

^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.