Transcript Christmas Tree Weed Control
DNA’s
Inhibit mitosis– primarily in the roots Differences in water solubility Surflan 2.5 ppm Pendulum 0.5 ppm Barricade 0.013 ppm
Paraquat / Gramoxone SL
Fast acting contact foliar Restricted use Highly toxic if swallowed
Gallery T&V
Disrupts root and hypocotyl development Water solubility 1 ppm Broadleaf killer only
Kerb SC
Inhibits mitosis– little foliar uptake Restricted use Water solubility 15 ppm
Plant Hormone Mimics
2, 4– D Garlon 3A Stinger
Garlon 3A
Directed spray applications Dougs more susceptible to damage than true firs Is one of the components of Crossbow
Spotted Catsear
Stinger
Do not apply to first year transplants Can apply over the top Good on Canada thistle, clovers
Canada Thistle
Goal 2XL
Contact activity with wide rate range Water solubility 0.1 ppm Good tank mix partner Goaltender
Sureguard WDG
Same mode of action as Goal 2XL Weed spectrum may be bigger Good residual 8 to 12 ounces per acre
Glyphosate Products
Roundup Weather Max, Roundup Powermax ,Accord Concentrate Razor, Glyphomax, Buccaneer, Mirage, Glystar………………and on and on……
Asulox
Inhibits mitosis Foliar activity Used for Bracken fern control
Horsetail
Axiom DF
24(c) label Water solubility 56 ppm Interferes with meristematic tissue Needs a tank mix partner
Westar
Premix of Oust and Velpar DF Supplemental label for OR & WA OK on new seedlings after one rain
Westar results
Problem Weeds
Bracken fern Glyphosate 2% Asulox Wild carrot or Queen Anne’s Lace Cultivation Mowing Westar, Sureguard
Problem Weeds
Fine Fescues moderate control with glyphosate 2%, spray to wet Better pre-emergent control with Pendulum or Axiom Woody species Garlon 3A on
Scotch broom
and Himalayan or Evergreen blackberries (use glyphosate on trailing BB)
Problem Weeds
Woody Species Glyphosate on deciduous brush 1.5-2 % with 0.5% non-ionic surfactant, spray fully leafed out foliage to wet
Poison oak
- 2% glyphosate on glossy, green leaves mid summer
Red Alder
- both Garlon 3A and glyphosate are effective
Cottonwood
- Garlon 3A
Problem Weeds
Field bindweed glyphosate or Garlon 3A burns back temporarily Others Weeds of concern?