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

Table 3

Palmer amaranth control 3 weeks after the final application 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 (%)
Glufosinate rate^c	451	68	C
	595	75	B
	738	79	A
	882	81	A
Sequential application timing	None	51	D
	7 DAI	84	Ab
	10 DAI	86	A
	14 DAI	80	Bc
	21 DAI	78	C

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.