Preemergence and postemergence control of certain annual grasses and broadleaf weeds in conifer seedbeds, transplants, and field- and container-grown nursery stock. Label recently expanded to include use as a directed spray in dormant deciduous shade trees. Also tank mixed with other herbicides for tall fescue sod suppression in orchards, Christmas tree plantations, and nurseries.

Preemergence: Annual grasses such as crabgrass, barnyardgrass, and annual bluegrass plus many broadleaves from seed including clover, groundsel, woodsorrel, bittercress, galinsoga, spurge, mallow, smartweed, and others.

Postemergence: Seedling annual grasses and broadleaf weeds including groundsel, pigweed, smartweed, wild mustard, lambsquarters, and others. Temporary suppression of several perennial broadleaf weeds has been reported.

Established grasses, goldenrod, horseweed, dogfennel, oxeye daisy, red sorrel, and other perennials. Large dicot weeds will be burned but not controlled.

For preemergence control, apply to a clean, weed-free soil surface. Irrigate following preemergence applications. Do not disturb the soil after application. For postemergence control, add 0.25 % nonionic surfactant and apply to seedling weeds less than 4 inches tall. May be tank mixed with other herbicides according to label directions to improve grass control. See label for additional information on timing and application methods.

Burns foliage of most broadleaf plants. Postemergence applications to conifer seedbeds should not be made until a minimum of five weeks after emergence of the conifer seedlings. Postemergence applications to container-grown conifers and conifer transplants should be made before bud break or after the foliage has hardened off. Do not apply in enclosed greenhouse structures. Do not store or transplant treated container stock in an enclosed vehicle until completion of four irrigations and a minimum of 21 days.

Up to eight weeks of weed control, depending on the application rate. Higher rates, 1 to 2 lb ai/A, are required for reliable preemergence weed control.

Relatively low water solubility results in negligible leaching potential in most circumstances. Leaching might occur in sandy soils with frequent irrigation; under those conditions, a postemergence application at lower rates would be preferred.

In preemergence applications, seedlings rarely emerge from the soil. After seedling emergence, it acts as a contact herbicide for which light is required. Foliar applications result in rapid (within days) necrosis of tissues contacted by the spray. Green, tender stems may be similarly burned. No direct effects on roots should occur. HRAC Group E; WSSA Group 14.