Foliar treatment. Foliar treatments are best made in summer, when plants are fully leafed out and actively growing; but application should be avoided when plants are stressed due to heat or drought. Products may be tank-mixed for enhanced brush control or for additional control of broadleaf weeds, such as when cleaning up fence lines; Remedy or Remedy Ultra, for example, may be mixed with DuraCor® herbicide for control of a broad range of brush and weeds.
See table 2 for mixing ratios for various sprayer sizes. This herbicide combination provides broad-spectrum control of many woody plants, including hedge (Osage orange, bois d’arc), multiflora rose, cottonwood, locust, sumac, Virginia creeper, hackberry and hawthorn, won’t damage desirable grasses and is effective against most broadleaf weeds — perfect for preserving valuable fence lines and general pasture cleanup where weeds and brush are present.
TABLE 2. Spot-treatment Mixing Guide — Broad-spectrum Brush and Weed Control (Water Carrier)
Surfactant (species-dependent) 0.25% NIS OR 1% MSO
DuraCor ® Herbicide (0.31% v/v)
Remedy ® or Remedy ® Ultra Herbicide (0.5% v/v)
SPRAYER SIZE
1 gallon 3 gallons 5 gallons 10 gallons 25 gallons 50 gallons
2.5 teaspoons 1.2 fluid ounce 2 fluid ounces 4 fluid ounces 10 fluid ounces 20 fluid ounces
4 teaspoons 2 fluid ounces 3.2 fluid ounces 6.4 fluid ounces
2 teaspoons 1 fluid ounce
8 teaspoons 4 fluid ounces 6.4 fluid ounces 12.8 fluid ounces
1.6 fluid ounces 3.2 fluid ounces 8 fluid ounces
1 pint
1 quart
1 quart
1 pint
2 quarts
Notes: NIS = nonionic surfactant; MSO = methylated seed oil. Spot treatments may be applied at an equivalent broadcast rate of up to 40 fluid ounces of DuraCor® herbicide per acre per annual growing season. However, not more than 50% of an acre may be treated at that rate.
Reclaim Lost Land Finally, when reclaiming tracts overrun by large trees, it’s important to work closely with your aerial applicator or local Corteva Agriscience Range & Pasture Specialist. These experts can help identify and record species present and develop a prescription program tailored to your needs. Once restored, your land — and your bottom line — will benefit from an effective pasture maintenance program. Keys to Success Regardless of your targeted species, application type or product, set yourself up for success by following a few simple guidelines. First, make sure you’ve accurately identified the species you’re targeting. Several smartphone apps are available to help with woody plant identification, or you can “go analog” and consult your local or county weed specialist. Understand what growth stage the species you’re targeting are in and act accordingly. With brush, during early spring greenup, nutrients are traveling up through the plant and pushing out new growth, so a foliar application that’s too early will prevent translocation throughout the plant, leaving the root system alive and intact. Patience is critical for foliar brush applications. By late spring, trees and other woody species might appear to be fully leafed out. Most likely, they still are pushing out new growth. Hold off on spraying until that new growth ceases. With foliar applications, thorough coverage is critical for complete control. Be sure to treat all leaves on all sides of the target plant. For trees that are too tall, cut down the tree and treat the stump to prevent resprouting. Larger trees at higher densities will be best controlled with aerial applications.
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