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

Table 5

CL-111 IR 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	—	95	—
2,4-D	1336	0	94	42−	0.0001
Quinclorac	420	0	94	84	0.0640
Triclopyr	282	0	94	84	0.0607
Cyhalofop-butyl	314	0	94	87	0.1974
Fenoxaprop-p-ethyl	122	0	94	84	0.0640
28 DAT
None	—	0	—	98	—
2,4-D	1336	0	98	38−	0.0000
Quinclorac	420	0	98	94	0.3881
Triclopyr	282	0	98	94	0.4014
Cyhalofop-butyl	314	0	98	97	0.9044
Fenoxaprop-p-ethyl	122	0	98	96	0.6831

^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.