International Scholarly Research Notices

Research Article

Influence of Soybean (Glycine max) Population and Herbicide Program on Palmer Amaranth (Amaranthus palmeri) Control, Soybean Yield, and Economic Return

Table 3

The influence of herbicide resistance trait, soybean plant population, and preemergence herbicide on Palmer amaranth control 2 weeks after POST application in Field E2 during 2010.^a


Soybean population^b	Preemergence herbicides^c	Palmer amaranth control
		Herbicide resistance trait^d
		Glyphosate	Glufosinate
		%

Low	None	43c	34d
Low	S-metolachlor	73b	74b
Low	S-metolachlor plus fomesafen	86a	82a
High	None	49c	49c
High	S-metolachlor	84ab	77b
High	S-metolachlor plus fomesafen	93a	97a

^aMeans within a herbicide resistance trait followed by the same letter are not significantly different according to Fisher’s Protected LSD test at P 0.05. Data are pooled over postemergence herbicides.
^bLow and high soybean populations were 145,000 and 464,000, respectively.
^cS-metolachlor and S-metolachlor plus fomesafen applied at 1500 and 1200 + 270 g ha⁻¹, respectively.
^dGlufosinate and glyphosate applied to appropriate herbicide-resistant cultivar at 560 g ha⁻¹ and 840 g ha⁻¹, respectively.