clopyralid (Stinger)
Rate 0.094 lb ae/A to 0.188 lb ae/A clopyralid (0.25 to 0.5 pint/A Stinger 3SC) to control annual broadleaf weeds. To control Canada thistle and suppress perennial sowthistle, use 0.125 to 0.25 lb ae/A clopyralid (0.5 to 0.66 pint/A Stinger 3SC).
Time Apply when beets have 2 to 8 true leaves. For annual weed control from weed emergence up to the 5-leaf stage and for Canada thistle, apply after most basal leaves emerge, but before bud stage.
Remarks May be tank mixed with Betamix or to control additional weeds. For most effective control of Canada thistle, apply broadcast to entire infested area and for best results, do not cultivate thistle patches. Apply at 10 gal/A or higher total spray volume. REI 12 hr.
Caution Wheat, barley, oats, grasses, field corn, or sugar beets may be planted any time following treatment. Do not plant alfalfa, asparagus, canola (rapeseed), Brassica species grown for seed, cole crops, dry beans, soybeans, grain sorghum, mint, onions, popcorn, safflower, sunflower, sweet corn, or strawberries for 12 months after applying clopyralid. Re-treat as necessary but do not exceed 0.66 pint/A per year. Preharvest interval is 45 days for beet roots and tops. Sensitive crops (alfalfa, dry beans, soybeans, sunflowers, lentils, peas, potatoes) may suffer injury or yield loss up to 24 months or more after application. The label is very specific about rotation intervals and should be consulted.
Site of action Group 4: synthetic auxin
Chemical family Pyridine