Glufosinate Rate and Timing for Control of Glyphosate-Resistant Rhizomatous Johnsongrass (Sorghum halepense) in Glufosinate-Resistant Soybean

Table 4

Glyphosate-resistant rhizomatous johnsongrass heights as a percent of the nontreated 28 d after treatment (DAT) and at harvest and soybean yield as influenced by POST2 and POST3 sequential glufosinate application rate.

Rate	Johnsongrass heights		Soybean yield
kg ai ha^−1	28 DAT (%)	At harvest (%)	kg ha^−1
0.5	48	77	2490
0.6	37	62	2620

Data pooled over POST1 glufosinate application rate of 0.5, 0.6, or 0.7 kg ai ha⁻¹ and POST2 and POST3 sequential glufosinate application timing.
Means followed by the same letter within each column are not significantly different based on Tukey’s HSD at .