Atticus Cavallo 4 SC is a systemic pre-emergence and post-emergence herbicide for selective contact and residual control of broadleaf weeds in labeled crops. In pre-emergence applications, weeds take up the product through the soil during weed emergence. Dry weather conditions reduce pre-emergent effectiveness of Atticus Cavallo 4 SC. At least 1/4-inch of rainfall must occur within 7-10 days of application; rotary hoeing activates Atticus Cavallo 4 SC. In postemergence applications, vulnerable weeds take up the product through treated foliage and stop growing soon after application. It can take up to two weeks for weeds to die. Atticus Cavallo 4 SC is absorbed by soil and/or through foliage of emerged weeds. Atticus Cavallo 4 SC does not control most species of grass weeds. Atticus Cavallo 4 SC can be tank-mixed with other herbicides registered to control grass weeds (see tank-mix information in this label for additional information). Atticus Cavallo 4 SC can be used in combination with a burndown herbicide prior to planting to provide weed control in field corn, seed corn, yellow popcorn, and sweet corn.