Table 2: Percent control, density, and dry weight of redroot pigweed in white bean treated with halosulfuron tankmixes applied PPI at Exeter (2011-2012) and Harrow, ON (2012). Means followed by the same letter within a column are not significantly different according to Fisher’s Protected LSD at .

Herbicide treatmentRate (g ai ha−1)ControlDensity Dry weight
4 WAE8 WAE
% # m−2 g m−2

Weedy check 006.0 c29.7 c
Weed-free check1001000.0 a 0.0 a
Trifluralin600 8096 0.7 ab 4.9 b
s-Metolachlor1050 84950.6 a 4.3 ab
Halosulfuron35 83100 0.8 ab 2.5 ab
Imazethapyr45 75922.0 b 3.9 ab
Trifluralin + halosulfuron600 + 35 851000.6 a 3.3 ab
Trifluralin + imazethapyr600 + 45 78100 0.8 ab 5.8 b
Trifluralin + halosulfuron + imazethapyr600 + 35 + 45 911000.6 a 3.5 ab
s-Metolachlor + halosulfuron1050 + 35 871000.4 a 2.0 ab
s-Metolachlor + imazethapyr1050 + 45 871000.3 a 1.6 ab
s-Metolachlor + halosulfuron + imazethapyr1050 + 35 + 45 911000.1 a 0.3 a

Abbreviations: WAE, weeks after crop emergence; PPI, preplant incorporated.