WEED CONTROL Herbicide Residue Scorpion III (flumetsulam + clopyralid + 2,4-D acid) may have a residue one or more years following application to corn. Refer to the paragraph in this section on Broadstrike (flumetsulam) for information on factors affecting breakdown of flumetsulam. Refer to the paragraph in this section on Broadstrike Plus Corn PRE/PPI and Stinger (clopyralid) for information on factors affecting breakdown of clopyralid. The amount of clopyralid applied when Scorpion III is applied at the labeled rate of 0.25 lb product/A is 0.17 lb ai/A. Stinger (clopyralid) is labeled for use corn at 0.12 to 0.25 lb ai/A. Therefore, precautions in crop rotation would apply as if clopyralid was applied alone at 0.17 lb ai/A. Rotational crop restrictions for Scorpion III are found on page 64 of the 1996 North Dakota Weed Control Guide in the table, "Rotation Restrictions for Crops Grown in North Dakota".