Diuron (Direx 4L, Diuron 4L, Diuron DF, Karmex DF)
Diuron is a substituted urea herbicide that is applied as a preemergent and is effective primarily on broadleaved weeds. After being taken up by the roots and spread throughout the plant, it acts to inhibit photosynthesis. At high rates the material is relatively nonselective and can injure trees. Diuron has a low acute toxicity to mammals even though it carries the signal word "WARNING" on the label. The signal word is applied because the compound can cause eye and throat irritation. It is much less of an irritant to intact skin. Do not apply to apple or pear trees that have been established less than 1 year or to peach trees established less than 3 years in the orchard. Diuron will not control emerged perennials such as dandelion, plantains, or yellow rocket. The use of diuron plus terbacil (Sinbar) on apples and peaches established at least 2 years in the orchard gives a broader spectrum of control.
You are here.