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Safe Use of Herbicides Around Water. Safe Use of Pesticides Around Water. Safe Use of Herbicides Around Water. Prevention and Containment Surveying and small-scale eradication Management Chemical Grazing management Biological. Prevention and Containment. Limit weed seed dispersal

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safe use of herbicides around water3
Safe Use of Herbicides Around Water
  • Prevention and Containment
  • Surveying and small-scale eradication
  • Management
      • Chemical
      • Grazing management
      • Biological
prevention and containment
Prevention and Containment
  • Limit weed seed dispersal
    • Limiting vehicles
    • Washing vehicles and equipment
    • Weed free seed
    • Holding livestock before introducing
    • Education to land-users
prevention and containment5
Prevention and Containment
  • Limit weed seed dispersal
  • Contain neighboring infestations
    • Contain the encroaching borders that can be easily controlled
    • Funnel livestock or wildlife to easily controlled areas
prevention and containment6
Prevention and Containment
  • Limit weed seed dispersal
  • Contain neighboring infestations
  • Properly manage desirable vegetation
    • Competitive plants
    • Proper grazing management
systematic surveys and then small scale eradication
Systematic surveys and then small-scale eradication
  • Key point….systematic and methodical (2-3 times/year)
  • Early detection makes for easy eradication
  • Combine surveys and eradication with good record-keeping
    • Helps determine # of years for control
    • Effectiveness of control methods
    • Response of both weed and desirable vegetation
management
Management
  • Chemical
  • Biological
  • Prevention
chemical management
Chemical management
  • At best the most you can hope for is seed management.
  • Total eradication of large patches is almost impossible
  • Flowing water or ditchbank
slide10
Ditchbanks

Ditchtop

Inner ditch

Reverse slope

Water

herbicides for ditchbanks
Herbicides for Ditchbanks
  • Make sure its labeled for ditchbanks
  • Choose a herbicide with:
    • Low persistence
    • Low water solubility
  • Time your application when runoff is unlikely
  • Prevent physical drift
solubility
Amount of chemical that can be dissolved into a solution

Expressed as parts per million.

> 30 ppm means high solubility = high tendency to leach or runoff.

Tordon = 400- 430

2,4-D = 890

Assert = 1370

Ally/Escort

1750 (pH 5)

2790 (pH 7)

213,00 (pH 9)

Paraquat = 7000

Roundup = 12,000

Solubility

Salt – 900,000 ppm

common herbicides used
Common Herbicides Used
  • Some 2,4-D products
  • Rodeo

Less commonly use products include:

* Garlon

* Krenite

herbicides 2 4 d
Herbicides – 2-4,D
  • Various labels in Montana
    • Amine 4 Selective Weed Killer – Wilbur-Ellis
    • 2,4-D Amine No.4 – Wilbur Ellis
    • Amine 400 – PBI Gordon
  • Some labels allow for overspray onto water
herbicides rodeo
Herbicides - Rodeo
  • Roundup labeled for aquatic uses
  • Do not apply within ½ mile of potable water intake
  • Must use approved (labeled) surfactants
  • Non-selective
herbicides krenite
Herbicides - Krenite
  • Do not apply to open water or where there is a danger of runoff.
  • Used mainly for woody and brushy species
    • Take care with non-target species
herbicides garlon
Herbicides - Garlon
  • Do not apply to open water or below the high water mark
safe use of herbicides around water18
Safe Use of Herbicides Around Water
  • Prevention and Containment
  • Surveying and small-scale eradication
  • Management
      • Chemical
      • Grazing management
      • Biological
slide19
Herbicides & Ditchbanks

Banvel, Stinger

Curtail

Tordon

Labeled

2,4-D’s

Rodeo

biological control
Biological Control
  • Slow acting but reduces seed production and stresses plants
  • KP… A main goal of riparian weed management is to control weeds immediately to prevent seed dispersal by moving water