Take Out Brush Economically While You Still Can.

July 31, 2015 | Dow

The best time to plant a shade tree, the saying goes, is 20 years ago. The second best time is now. Similarly, the best time to control invasive brush is probably before you noticed the encroachment. The second best time may well be this summer. Spraying plants and patches when they’re small can save you a more expensive bulldozer later while preventing lost grass production. Cost-effective herbicide treatments can be matched to your weed and brush problem, equipment, labor and time. Your Dow AgroSciences Range & Pasture Specialist or local agronomist can help you customize a brush control plan. Here’s where the experts often start: a tank mix of GrazonNext® HL herbicide and either PastureGard® HL herbicide or Remedy® Ultra herbicide – a one-two combination that controls most woody plants and broadleaf weeds while leaving desirable grasses unharmed. The first method the experts often suggest is high-volume foliar treatment (leaf spray). With this method, you hand-spray the herbicide solution on the leaves until the entire plant is covered.

It’s an ideal summer control option:

  • You can do it yourself with equipment you likely already own.
  • It takes out brush and most broadleaf weeds.
  • You can control what you want to control – targeted application keeps desirable plants intact for shade or wildlife habitat.

High volume foliar applications work great for encroaching bush from fence-lines; scattered saplings; multi-stemmed plants, like sumac and multi-flora rose; and expanding patchy brush, including plum thickets.

Spray the leaves

Prepare a general brush control mix of 1/4 percent (1/4 of 1 percent Grazon Next HL pus 1/2 percent PastureGard HL (or Remedy Ultra) plus 1/2 percent surfactant. ( See table nearby for mixing ratios.) Spray the leaves of target plants until they are wet. Thorough coverage is essential, so the method works best on trees and brush shorter than 8 feet tall. You can apply this mix with equipment ranging from backpack sprayers to ATV-mounted sprayers or large tractor-powered sprayers. The mix is effective on hedge (bois d’arc), rose, locust, sumac, Russian or autumn olive and many others while not harming desired grasses.

Spot Treatment Mixing Guide

Broad-Spectrum Brush and Weed Control (water carrier)

 

Sprayer Size

Remedy Ultra or

PastureGard HL (1/2%)

 

GrazonNext HL

 

Surfactant (1/2%)

1 Gallon

4 teaspoons

2 teaspoons

4 teaspoons

3 Gallons

2 fluid ounces

1 fluid ounces

2 fluid ounces

5 Gallons

3.2 fluid ounces

1.6 fluid ounces

3.2 fluid ounces

10 Gallons

6.4 fluid ounces

3.2 fluid ounces

6.4 fluid ounces

25 Gallons

1 pint

8 fluid ounces

1 pint

50 Gallons

2 pints

1 pint

2 pints

100 Gallons

4 pints

2 pints

4 pints

 Note: Spot treatments may be applied at an equivalent broadcast rate of up to 68 fluid ounces of GrazonNext® HL herbicide per acre per annual growing season. However, not more than 50 percent of an acre may be treated at that rate.

Broadcast Options

When you face widespread woody sprouts or saplings and broadleaf weeds, a broadcast application may be the most efficient. As a rule of thumb, broadcast foliar applications become more cost-effective when brush densities exceed 300 plants per acre. Plant conditions and spray coverage are critical with broadcast treatment. Timing depends on your target brush. If you’re unsure about timing for your brush, check with your local Dow AgroSciences Range & Pasture Specialist or local agronomist. Ground rigs equipped with booms or boomless nozzles work well for broadcast applications as long as target brush is small enough to cover with the spray solution. That means short enough for fixed booms to pass over or, typically, shorter than 10 feet for boomless rigs. For much of the country a mix of GrazonNext HL pus PastureGard HL (or Remedy Ultra) will offer cost-effective control of most species. Apply 2 pints of GrazonNext HL puls 1 to 2 pints of PastureGard HL or Remedy Ultra per acre. (Ash, Dogwood, elms and oaks require higher rates of PastureGard HL or Remedy Ultra.) Include 1/2 percent (4 pints per 100 gallons of total spray mix) of a quality agricultural surfactant and a drift reduction agent. Apply the mix in 12 to 25 gallons of total spray volume per acre. Use higher spray volumes to ensure adequate coverage with increased depth and density of foliage. Plan to follow up in subsequent years with individual plant treatments to finish the job and maintain success.

 

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