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

Table 3

Days from planting to initial silk emergence and silking duration as influenced by herbicide program during 2012 at Lewiston-Woodville.

Herbicides applied postemergence^a	Herbicide rate	Silking^b				Grain yield^c
		Time from planting to initial silking		Time from silk initiation to final silking
		Field 1	Field 2	Field 1	Field 2
	g ha^−1	d				kg ha^−1
No POST herbicide	—	66^a	68^a	12^a	11^d	3570^c
Dicamba	140	66^a	64^bc	11^a	15^ab	4050^bc
Glufosinate	560	66^a	63^c	11^a	15^ab	4950^a
Glyphosate	840	66^a	63^c	11^a	15^ab	4530^ab
Atrazine	1100	66^a	65^b	11^a	14^bc	3620^c
Atrazine plus dicamba	1100 + 140	66^a	65^b	11^a	13^c	4220^b
Atrazine plus glufosinate	1100 + 560	66^a	63^c	12^a	16^a	3660^c
Atrazine plus glyphosate	1100 + 840	66^a	64^bc	12^a	15^ab	4290^b

^aS-metolachlor applied PRE to all plots immediately after planting.
^bMeans within a field followed by the same letter are not significantly different at . Data are pooled over planting patterns.
^cMeans followed by the same letter are not significantly different at . Data are pooled over planting patterns.