Weed Control in Dicamba-Resistant Soybean with Glyphosate/Dicamba Applied at Various Doses and Timings

Table 1

Density of weed species present at each evaluation for Ridgetown and Exeter, ON, sites.

Weed species	Timing	Weed density (#m^−2)
		R-2016a	R-2016b	R-2017	E-2017	R-2018a	R-2018b	E-2018
Amaranthus spp.	4 WAA	57	19	19	11	11	—	6
	8 WAA	35	17	21	9	10	—	4
	10 WAC	50	5	10	9	13	—	2
Ambrosia artemisiifolia	4 WAA	9	14	—	12	54	23	—
	8 WAA	9	28	—	12	21	8	—
	10 WAC	12	17	—	12	13	7	—
Chenopodium album	4 WAA	33	10	12	12	21	23	5
	8 WAA	30	25	14	12	15	13	3
	10 WAC	18	10	13	13	10	13	1
Echinochloa crus-galli	4 WAA	—	—	—	9	—	3	19
	8 WAA	—	—	—	8	—	7	12
	10 WAC	—	—	—	8	—	9	12
Setaria faberi	4 WAA	99	114	70	—	3	—	—
	8 WAA	143	138	86	—	4	—	—
	10 WAC	136	82	88	—	4	—	—
Setaria viridis	4 WAA	—	—	—	26	19	28	25
	8 WAA	—	—	—	26	12	22	18
	10 WAC	—	—	—	24	6	18	12

Note. ^∗—: not present at location; E: Exeter; R: Ridgetown; WAC: weeks after final herbicide application; WAA: weeks after herbicide application.