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 4

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


Preemergence herbicide^b	Postemergence herbicide	Palmer amaranth control
		Herbicide resistance trait^c
		Glufosinate	Glyphosate
		%

None	No	0e	0d
S-metolachlor	No	33d	54b
S-metolachlor plus fomesafen	No	62b	46c
None	Yes	46c	59b
S-metolachlor	Yes	64ab	81a
S-metolachlor plus fomesafen	Yes	70a	85a

^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 soybean population.
^bS-metolachlor and S-metolachlor plus fomesafen applied at 1500 and 1200 + 270 g ha⁻¹, respectively.
^cGlufosinate and glyphosate applied to appropriate herbicide-resistant cultivar at 560 and 840 kg ha⁻¹, respectively.