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Summary of Brush Control Research: Where Has It Led

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Summary of Brush Control Research: Where Has It Led? Why Is ... Black locust and ailanthus. Prolific resprouting. Timing. Herbicides. Cut Surface Treatments ... – PowerPoint PPT presentation

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Title: Summary of Brush Control Research: Where Has It Led


1
Summary of Brush Control Research Where Has It
Led?
2
Why Is This Important?
  • Miles of Roadway - 44,000
  • Big expense
  • 27 Million Roadside Vegetation Management
  • 18 Million Brush Control
  • Diverse Terrain
  • Various Species
  • Many Options - Equipment, Techniques, Chemistry

3
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4
Mechanical versus Herbicides
  • 16 M vs. 2 M
  • Approximate Costs
  • 80.00/ac Weed and Brush Program
  • 61.00/ac Brown Brush Cutter
  • Optimistic (12 ac/day)
  • Still have sprouts to contend with.
  • Fits into Mow Less to Mow More
  • 1,000-1,200/ac 5 man Clearing Crew

5
Bottom Line
  • What is the most cost effective program?
  • Controlling targets is essential
  • 75-90 brush related studies conducted during
    history of project.
  • Learned something. Each built on last.

6
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7
Bottom Line
  • What is the most cost effective program?
  • Controlling targets is essential
  • 75-90 brush related studies conducted during
    history of project.
  • Learned something. Each built on last.

8
Herbicide Application Methods
  • High Volume Foliar
  • Low Volume Foliar
  • Basal Bark Treatments
  • Dormant Stem Treatments
  • Cut Surface Treatments
  • Others

9
High Volume Foliar
  • Works, is necessary for some situations.
  • Investigated Krenite, Arsenal, Escort, Garlon,
    and Roundup.
  • Reviewed control by species, carrier volume,
    carrier type, understory damage, adding
    surfactants.

10
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11
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12
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13
High Volume Foliar
  • Works, is necessary for some situations.
  • Investigated Krenite, Arsenal, Escort, Garlon,
    and Roundup.
  • Reviewed control by species, carrier volume,
    carrier type, understory damage, adding
    surfactants.

14
High Volume Foliar (cont.) Using Krenite S
  • Adding Arsenal, Escort, Garlon, or Roundup to
    Krenite S to pickup misses.
  • All help with misses.
  • Garlon, Roundup, Escort cause premature brownout.
  • Arsenal (at higher rates) or Escort move beyond
    treated branches.
  • Krenite S/Arsenal Safety to Groundcover
  • Krenite S Incr. GPA, Incr. understory damage.
  • 2 oz/ac Arsenal safe on creeping red and tall
    fescue, but harms hard fescue.
  • 4 oz/ac Arsenal damages all three.

15
High Volume Foliar (cont.) Using Garlon 4
  • Garlon 4 (2 or 4 qts) no different than 6 qts
    Krenite S alone.
  • Controlling resprouts after brushing
  • 2 qts/ac Garlon 4 best

16
High Volume Foliar What works?
  • 4-6 qts Krenite 1-4 oz Arsenal
  • 6 qts Krenite S 1 oz Arsenal
  • 2 qts Garlon 4 0.5 oz Escort
  • 4 qts glyphosate 4 oz Arsenal
  • Add 0.25 surfactant

17
Low Volume Foliar
18
Low Volume Foliar
  • First looked at in 1991 while comparing triclopyr
    formulations.
  • 2 qts/ac Garlon 4 showed greater control than 6
    qts/ac Krenite S.

19
Low Volume Foliar (cont.)
  • Little difference in control between 4 and 6
    qts/ac Krenite S when 4 oz/ac Arsenal added.
  • Even 3 qts/ac Krenite S 4 oz/ac Arsenal worked
    well in demos. 15 GPA (5 Krenite S 0.25
    Arsenal).
  • 2.5 qts/ac glyphosate 4 oz/ac Arsenal performs
    well.
  • 2 qts/ac glyphosate alone excelled in several
    trials.

20
Low Volume Foliar (cont.)
  • Using backpack Sprayers
  • Solo 475 (diaphragm) not 425 (piston)
  • Birchmeier
  • ULV wands with adjustable conejet nozzles.
  • Y-2 and X-6 tips deliver 30-35 ft. reach

21
Solo 425 vs. 475 Backpack Sprayer
GOOD
BAD
Solo 475 Diaphragm
Solo 425 Piston
Images courtesy of www.epinions.com
22
Low Volume Foliar (cont.)
  • Using backpack Sprayers
  • Solo 475 (diaphragm) not 425 (piston)
  • Birchmeier
  • ULV wands with adjustable conejet nozzles.
  • Y-2 and X-6 tips deliver 30-35 ft. reach

23
Low Volume Foliar Truck Based
  • Injection systems
  • Eliminate mixing.
  • Adjust mix on the fly.
  • Norstar Heads vs. Cibolo vs. radiarc
  • Norstar and Cibolo offer adjustable patterns
    while applying.
  • All offer acceptable low volume, truck-based
    brush control.

24
Spray Heads
www.waldrumspecialties.com
www.norstarind.com
25
What Works with Low Volume?
  • Backpacks
  • 5 Krenite S 0.5 Arsenal
  • 5 Glyphosate 0.5 Arsenal
  • Truck-based
  • 6 qts Krenite S 1 oz Arsenal
  • 2 qts Garlon 0.5 oz Escort

26
Basal Bark Treatments
  • Garlon vs other Herbicides
  • Access (picloramtriclopyr), Weedone, Banvel 520
  • Percentages
  • Diluents
  • Species
  • Translocation
  • Timing

27
Basal Bark What Works?
  • 25 Garlon 4 75 Basal Oil
  • Target root suckering species mid- to late-
    summer.
  • Anticipate foliar treatment next season.

28
Dormant Stem Treatments
  • 2.5-5 Garlon 2-3 non-ionic surfactant water
    _at_ 110 GPA (95-100 control contacted branches)
    March/April timings
  • 4-6 qts/ac Garlon 4 8 qts/ac COC 75GPA
  • Black cherry, honeysuckle were missed
  • 1996-1999 Accord investigated
  • 50 Accord 25surfactant water covered lower
    36 inches of main stem 90 control. G4 not good
    at 5

29
Dormant Stem Treatments What Works?
  • Nothing is consistent.
  • Problems
  • Application Method
  • Species
  • Timing
  • Understory Damage

30
Cut Surface Treatments
  • Work with Krenite S
  • Obtained supplemental labeling.
  • Controlling root-suckering species
  • Black locust and ailanthus
  • Prolific resprouting
  • Timing
  • Herbicides

31
Cut Surface Treatments What Works?
  • 25 Garlon 4 75 Basal Oil
  • Use basal oil to extend treatment window
  • Safe up to 4 weeks after treatment

32
Other
  • Injection
  • Method Comparison
  • Nozzle, Pressure, Drift Control
  • Adjuvants
  • Ailanthus Conversion
  • Sproutless

33
Conclusion
  • Have a general plan.
  • Integrate mowing, brushing, and spray program.
  • Look for unique sites. Develop a plan.
  • Utilize all the tools available.
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