Timing and Application Rate for Sequential Applications of Glufosinate are Critical for Maximizing Control of Annual Weeds in LibertyLink® Soybean

Table 7

Percent control of barnyardgrass and broadleaf signalgrass at harvest for the main effects of glufosinate rate and sequential application timing, averaged over the other factors in Fayetteville, AR, in 2015, 2016, and 2017.

Main effect	Level	Control^b (%)
		Barnyardgrass		Broadleaf signalgrass
Glufosinate rate^c	451	69	c	68	c
	595	75	b	77	b
	738	79	a	79	ab
	882	80	a	81	a
Sequential application timing	None	59	b	59	b
	7 DAI	80	a	78	a
	10 DAI	80	a	81	a
	14 DAI	80	a	81	a
	21 DAI	80	a	82	a

DAI, days after initial application. ^bFor a given main effect, means within a column followed by the same letter are not different according to Fisher’s protected LSD (α = 0.05). ^cGlufosinate rates are in g ai ha⁻¹.