Skip to main content

Crop and Pest Management Guidelines

A Cornell Cooperative Extension Publication
Skip Navigation LinksHome > Cornell Guidelines > 2024 Trees and Shrubs Table of Contents > 4 Weed Management in Nursery Crops > 4.8 Description and Characteristics of Herbicides Registered for Nursery and Landscape Use > Acclaim Extra
Page Contents
44759

Acclaim Extra

Common Name: fenoxaprop

Formulation: 0.57EC

Uses: Postemergence control of annual and perennial grass weeds in established turfgrass, nursery crops, and landscape ornamentals, including many trees, shrubs, herbaceous perennials, and annuals.

Amount of active ingredient

Amount by formulation

0.57EC

Per Acre

0.1 to 0.3 lb.

3.5 to 39 oz.

Per 1,000 sq. ft.

0.02 to 0.17 lb.

0.08 to 0.90 oz.

Recommended rates for annual grass control:

Growth stage

oz./A

oz./1,000 sq. ft.

seedling (untillered)

13

0.30

1-2 tillers

20

0.46

3-4 tillers

28

0.64

Major Weeds Controlled: Annual grasses such as crabgrass, goosegrass, barnyardgrass, foxtails, and panicums. Japanese stiltgrass Microstegium viminium is controlled.

Major Weeds Not Controlled: Annual bluegrass, broadleaf weeds, or sedges. Most perennial grasses are tolerant

For Best Results: Apply to young (seedling to 3-tiller) actively growing grasses. May be tank mixed, following label directions with other pre- and postemergence herbicides. Thorough spray coverage is essential for optimal results. Flat fan nozzles are recommended. Addition of a nonionic surfactant is generally recommended.

Cautions and Precautions: Do not use on Bar Harbor juniper, Salvia, Philodendron, Podocarpus, or Pittosporum. Check label for other species restrictions. Weed and crop tolerance may vary according to environmental conditions, and tolerance should be determined before extensive use. Do not apply more than a total of 120 oz. per acre per growing season. Do not apply more than 28 oz./A to Kentucky bluegrass or zoyziagrass.

Residual Activity: Up to two weeks of residual control has been reported.

Volatility and Leaching Potential: Loss from volatility is minimal. Leaching is negligible.

Symptoms and Mode of Action: Growth inhibition occurs within 48 hr. Meristems turn black shortly thereafter. Yellow to red foliage develops in about 7 to 10 days, leading to death within about 14 days. Mechanism of action involves inhibition of lipid synthesis at the root and shoot meristems.

Manufacturer: Bayer Environmental Science

EPA Reg. No.: 432-950