Weed Control and Corn (Zea mays) Response to Planting Pattern and Herbicide Program with High Seeding Rates in North Carolina

Table 2

Common ragweed and Texas panicum densities 6 weeks after treatment as influenced by herbicide program during 2012 at Lewiston-Woodville.

Herbicides applied postemergence^ab	Herbicide rate	Common ragweed^c	Texas panicum^d
			Field 1	Field 2
	g ha^−1	Number in m^2
No POST herbicide	—	20.1^a	10.5^b	22.1^bc
Dicamba	140	0^b	21^a	42.5^a
Glufosinate	560	1.1^b	17.3^ab	27.5^b
Glyphosate	840	3.3^b	12.8^ab	17.2^c
Atrazine	1100	0.3^b	18^ab	41.7^a
Atrazine plus dicamba	1100 + 140	0.1^b	13.3^ab	44.1^a
Atrazine plus glufosinate	1100 + 560	1.1^b	15.4^ab	19.1^bc
Atrazine plus glyphosate	1100 + 840	0.5^b	13.8^ab	23.5^bc

^aS-metolachlor applied PRE to all plots immediately after planting.
^bThe corn hybrid was tolerant of both glufosinate and glyphosate.
^cMeans followed by the same letter are not significantly different at . Data are pooled over fields and planting patterns.
^dMeans followed by the same letter are not significantly different at . Data are pooled over planting patterns.