Special-equipment Applications
Wick, wiper, or roller applications
glyphosate (several trade names)
Rate 3 lb ae glyphosate (1 gal of 3 lb ae/gal formulation) + 2 gal water
Time Weeds should be at least 6 inches taller than the crop. For best results, perennial weeds should be in early-bud, late-boot, full-bloom, or early-seed stage. Control annual weeds before hard seed stage.
Remarks Use in wick or wiper applicators to control annual and perennial weeds. In heavy infestations, reduce speed to ensure adequate wiper coverage. Two cross-direction applications may improve control. Repeat applications may be required to control dense clumps or severe weed infestations. In roller applicators, a more dilute rate of 3 lb ae glyphosate (1 gal) + 5 gal water has proven satisfactory.
Caution Equipment should be in good condition to avoid dripping or crop contact. Maintain roller speed at 40 to 60 rpm; do not exceed 5 mph. Do not graze or feed within 14 days of wiper application.
Site of action Group 9: inhibits EPSP synthase
Chemical family None generally accepted
Shielded sprayer applications
glyphosate (several trade names)
Rate Apply 0.75 to 2.25 lb ae (1 to 3 quarts of 3 lb ae formulation) as a broadcast spray in 10 to 20 gal/A total spray volume
Time Apply to actively growing weeds.
Remarks Results are best when grass is planted in uniform, straight rows and crop is small enough to easily pass alongside or through the protective shields.
Caution Grower assumes all responsibility for crop losses from misapplication.
Site of action Group 9: inhibits EPSP synthase
Chemical family None generally accepted