Rate and Timing Effects of Growth Regulating Herbicides Applications on Grain Sorghum (Sorghum bicolor) Growth and Yield

Table 6

Sorghum height at boot stage as affected by growth regulating herbicide rate and application timing in North Carolina.

Herbicide	Rate; g ae ha^−1	Timing; cm	Rocky Mount			Clayton		Kinston
			2012	2013	2014	2012	2013	2014
			cm
2,4-D	100	35	75	101	87	58	84	86
	220	35	77	95	86	59	85	91
	330	35	78	103	85	59	85	91
Dicamba	280	35	70	88	89	58	85	90
2,4-D	100	45	76	94	83	58	89	95
	220	45	78	94	84	62	83	93
	330	45	77	101	86	63	85	93
Dicamba	280	45	78	94	87	53	85	91
2,4-D	100	55	76	99	86	62	85	91
	220	55	78	100	85	61	93	88
	330	55	77	104	87	59	88	88
Dicamba	280	55	76	95	85	57	86	88
2,4-D	100	65	74	100	88	56	95	81
	220	65	75	96	87	58	90	83
	330	65	75	102	86	57	93	86
Dicamba	280	65	74	95	86	57	97	83
Weed-free control			71	101	85	55	86	83

Means within a column followed by the same letters are not different according to Fisher’s protected LSD test at .