Brush

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Brush Weed Integrated Pest Management
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Brush Busters
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Brush Busters Philosophy

• Treat brush when most vulnerable.
• Use most effective treatment option.
• Be environmentally and user safe.
• Keep everything simple.

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Benefit of Brush Busters
Later Control
Early control
vs.
200/acre
10/acre
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Current Brush Busters Species

• Mesquite
• Cedar
• Pricklypear
• Chinese Tallowtree
• Greenbriar

• Yucca
• Saltcedar
• Huisache
• Macartney Rose
• Cut Stump Treatments

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Brush Busters How to Beat Mesquite
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Whats the Target?
Soil surface
Dormant bud zone
Root
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Mesquite Stem Spray Equipment
24-in. wand
ConeJet 5500-X1 Adjustable cone nozzle
Back-saver shoulder harness
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Select Appropriate Nozzle
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Mesquite Stem Spray Nozzle
X
ConeJet 5500-X1
ConeJet 5500-X8
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Screen/Check Valve for Mesquite Stem Spray
100-mesh brass or polypropylene with stainless
steel screen. Prevents clogging of nozzle
prevents dripping of spray from nozzle
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Brush Busters Stem Spray
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Triclopyr
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Brush Busters Stem Spray

• 15-25 triclopyr 75-85 diesel or vegetable
  oil.
• Lightly wet all stems, all way around, from
  ground line to height of 12.
• Works anytime of the year.
• No soil activity.

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Brush Busters Leaf Spray
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Pump-up Garden Sprayers
Backpack Sprayers
ATV-Mounted Sprayer Rigged For 3 Spray guns
12-volt ATV-Mounted Sprayers
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Mesquite Leaf Spray Nozzle
X
ConeJet 5500-X8
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Mesquite IPT Leaf-spray Ingredients Mixed
in Water as a Carrier
Triclopyr
Clopyralid
Spray marking dye
Surfactant
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Brush Busters Leaf Spray

• ½ Triclopyr
• ½ Clopyralid
• ¼ Surfactant
• ¼ Dye
• Spray to wet after leaves turn dark green.
• Spray window 45 days after bud break through
  September??

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Carbohydrate Flow
?
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Brush Busters Mesquite Leaf Spray

• Dont spray if
• leaves are wet,
• foliage has gt25 damage due to hail, insects,
  or disease,
• there is new growth evident in twig tips.

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Brush Busters Mesquite Leaf Spray
Wait until 3rd growing season after mesquite top
killed/damaged by fire or mechanical disturbance
before using leaf spray.
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Brush BustersCut Stump Treatments

• Certain herbicide treatments highly effective
  when applied to recently cut stumps.
• Brush Busters two 3-step methods.

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Brush Busters Cut Stump Spray for Hardwood Species

• 15 triclopyr 85 diesel fuel or vegetable oil.
• Works best on

• Algerita
• Baccharis
• Blackbrush
• Bois darc
• Bumelia
• Catclaw acacia
• Catclaw mimosa
• Chinese tallowtree
• Elm
• Hackberry

• Huisache
• Lotebush
• Mesquite
• Oaks
• Pricklyash
• Saltcedar
• Texas persimmon
• Winged elm
• Yaupon

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Brush Busters Cut Stump Spray

• Cut every stem close to soil surface.
• Avoid leaving soil on the cut stump.
• Spray stump immediately after cutting.
• Adjust nozzle to deliver coarse mist.
• Spray entire cut surface, especially outer edges.
  
• Spray bark from cut to ground level.
• Use Hi-Light spray dye to assure good coverage.

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Cut Stump Treatments Can Provide Almost 100
Plant Mortality If Done Properly
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Brush Busters Cut Stump Treatments
Spray every cut stem. One stem on this tree
was not sprayed.
Spray entire cut surface bark from cut to
ground. Part of this cut stem was not sprayed.
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Modified Sharpshooter Grubber
The Vendetta
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Severs roots below bud zone
The Vendetta
No herbicides No mixing Instant
gratification The organic method Great
exercise
Mesquites can be removed from pasture
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Weed Busters
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Weed Busters

• Uses common spray equipment.
• Recommends only the BEST treatments.
• Focuses on do-it-yourself ground applications.
• Stresses early treatment.

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Weed Busters

• Annual Broomweed
• Drummond/Common Goldenweed
• Silverleaf Nightshade
• Threadleaf Groundsel
• Rayless Goldenrod
• Perennial Broomweed
• Western Horsenettle
• Texas Bullnettle
• Sprayer Calibration Guide

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IPT vs Broadcast Rates
1 gal/ac Herbicide
1 Herbicide
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IPT Weed Spray Rig

• ATV 12 volt power source
• 14 25 gal. poly tank
• 1.4 1.8 gpm 12 volt pump.
• 3/8 inch hose
• Poly spray wand
• Conejet X8 nozzle
• 100 mesh screen/check valve.

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ATV sprayer rigged for 3-man crew
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Leaf Spray
Weed Spraying
Stem Spray
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Equipment for Broadcast Weed Spraying
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Pressure Gauge
By-Pass Valve
Pressure gauge and by-pass need to be added for
broadcast spraying
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Accurate speedometer needed for broadcast
spraying
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Boom Sprayer with Flat Fan Nozzles
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FieldJet KLC-9 boomless nozzle on ATV
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BoomJet 5880-3/4-2TOC06 boomless nozzle
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Broadcast Spray Rules of Thumb

• 20 to 30 psi
• 10 to 30 gpa
• CALIBRATE!

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Beware Of Mist Blowers
Prohibited On Many Labels
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Annual Broomweed IPT

• Best on few or scattered plants.
• Treat spring to early summer.
• Herbicides 2,4-D, Grazon PD, Weedmaster or
  Range Star _at_ 1 concentrations
• Add ¼ surfactant.

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Annual Broomweed Broadcast

• Best on heavily infested areas.
• Apply late March May (plants less 6 tall
  best).
• Herbicides 2,4-D, Grazon PD, Weedmaster, Range
  Star, Cimarron, Cimarron Max or Ally.
• Add ¼ surfactant.

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Annual Broomweed Broadcast
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Silverleaf Nightshade IPT

• Best on scattered plants.
• Apply in spring when plants begin to flower.
• 1 Grazon PD, Surmount, Weedmaster or Range
  Star.
• ¼ Surfactant.

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Silverleaf Nightshade Broadcast

• Best on heavily infested areas.
• Apply in spring when plants begin to flower.
• 1 qt/ac Grazon PD, Surmount, Weedmaster or Range
  Star.
• ¼ Surfactant.

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agrilifebookstore.org
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Calibration!!
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Sprayer Calibration Example
Recommended Herbicide Rate 1qt/ac
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Keep These Points in Mind

• To properly calibrate you must accurately set and
  maintain speed and pressure.
• Make sure all nozzles in good condition.
• Dont clean nozzles with hard object.
• Nozzles wear.

• Minimum spray volume of 10 gal/ac.
• Spray pressures between 20 and 30 psi.
• Ground speeds between 3 and 4 mph.
• Broadcast sprays can DRIFT!

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Weed Resistance to Herbicides

• Inherent ability of
• Weed survival to
• Herbicide applications to which
• Original population was susceptible

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How does herbicide resistance start?
Repeated use of highly effective long residual
herbicide
Weed biotypes tolerant to the herbicide survive
go to seed
Continued herbicide use eliminates competition
for resistant biotype population
Resistant biotype thrives
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How does herbicide resistance start?

• No clear explanation biotype origin
• Herbicide-use itself not shown as cause
• Assumed 1 resistant weeds natural

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Herbicide Characteristics Conducive to Resistance

• Act at single site of action
• Applied multiple times during growing season or
• Long soil residual
• Used several consecutive growing seasons
• Herbicides as only weed management

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Avoiding Managing Resistant Weeds

• Integrated management
• Herbicides only when necessary
• Combine w/ mechanical, cultural, or biological
• Rotate herbicide use w/ different modes of action
  
• Clean tillage harvesting equipment

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Growth Regulator Herbicides