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Parazone 3SL is a contact herbicide that is rapidly absorbed by green plant tissue. Once absorbed the active ingredient interacts with the photosynthetic process to produce superoxides that destroy the plant cells. Parazone 3SL must be applied to green plant tissue and complete coverage of all green foliage is necessary for effective weed control and effective leaf drop, desiccation and defoliation. Activity of Parazone 3SL is reduced when applied to drought-stressed weeds, weeds with little green foliage or to the mature woody bark of trees and vines. Parazone 3SL is rapidly adsorbed by clay soils and organic matter and has no residual soil activity. As a contact herbicide, Parazone 3SL will control most small broadleaf and grass weeds, as well as suppress perennial weeds through the destruction of green foliage. Parazone 3SL can also be used at harvest as a desiccant or defoliant.
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