2002 Bareground Studies

1
2002 Bareground Studies

• Oust vs. Oust XP
• Diuron Comparison
• Pramitol Diuron Mixes

2
Whats New

• Not much new chemistry
• Reformulating products
• Premixes
• Generic products

3
Comparison of Oust versus Oust XP for Bareground
Weed Control
4
Broad Spectrum Residual Herbicides

• Oust sulfometuron
• Arsenal, Sahara imazapyr
• Spike tebuthiuron
• Pramitol prometon

Industry standard, cheap Pre and post
activity Weak on estd perennials when applied pre
5
Oust XP

• New formulation
• Same 75 active ingredient
• Extruded granule process
• Better solubility
• Re-suspends
• Less dust

6
Objective

• To determine any differences in effectiveness
  between these two formulations of sulfometuron.

7
Treatment List

• Product Rate
• (oz/ac)
• Untreated ---
• Oust 3
• Oust XP 3
• Oust 3
• Krovar I 160
• Oust XP 3
• Krovar I 160
• Oust 3
• Karmex 160
• Oust XP 3
• Karmex 160

• Product Rate
• (oz/ac)
• Oust 3
• Milestone 8
• Oust XP 3
• Milestone 8
• Oust 3
• Karmex 160
• Glypro 48
• Oust XP 3
• Karmex 160
• Glypro 48

8
Methods and Materials

• Fox Hollow Rd., University Park
• Applied April 2, 2002
• 3 reps, RCBD
• CO2-powered sprayer single OC-12 nozzle
• 40 GPA
• Qwikwet 357, surfactant added to all trts.

9
Original Species

• Original species included
• Smooth brome (Bromus inermis)
• Wild garlic (Allium vineale)
• Poison hemlock (Conium maculatum)
• Common burdock (Arctium minus)

10
Post Treatment Species

• Common ragweed (Ambrosia artemisiifolia)
• Horseweed (Conyza canadensis)
• Green foxtail (Setaria viridis)
• Giant foxtail (Setaria faberi)
• Common burdock (Arctium minus)
• Wild parsnip (Pastinaca sativa)
• Catnip (Nepeta cataria)
• Kochia (Kochia scoparia)

11
Ratings

• April 8 (6 DAT)- Initial cover rating
• May 6 (28 DAT)- Percent control
• May 30 (52 DAT)- Percent control

12

• Product Rate 28 DAT 52 DAT
• (oz/ac) Ctrl Ctrl
• Untreated --- 0 0
• Oust 3 92 92
• Oust XP 3 98 90
• Oust 3 100 100
• Krovar I 160
• Oust XP 3 100 100
• Krovar I 160
• Oust 3 100 100
• Karmex 160
• Oust XP 3 100 100
• Karmex 160
• LSD (p0.05) 26 10

13

• Product Rate 28 DAT 52 DAT
• (oz/ac) Ctrl Ctrl
• Oust 3 100 100
• Milestone 8
• Oust XP 3 70 100
• Milestone 8
• Oust 3 100 100
• Karmex 160
• Glypro 48
• Oust XP 3 100 97
• Karmex 160
• Glypro 48
• LSD (p0.05) 26 10

14
Discussion

• No differences in effectiveness observed between
  Oust and Oust XP.
• Oust and Oust XP used alone will not provide
  broad spectrum control. Common ragweed was the
  most significant escape.
• Either formulation used as part of a basic mix
  will provide adequate control in most bareground
  maintenance situations.

15
Comparison of Several Diuron Products for
Bareground Weed Control
16
Objective

• To compare two new diuron products to those
  common to the marketplace.
• MANA-202 (7F)
• 65 a.i. (diuron) 7 lb a.i./gal
• MANA-203 (90DF)
• 90 a.i. (diuron)
• Makhteshim-Agan of North America

17
Preemergence Herbicides

• Karmex diuron
• Pendulum pendimethalin
• Endurance prodiamine
• Surflan oryzalin
• Plateau, Oasis imazapic

Old standby, cheap Pre and early post - will
catch up to emerged seedlings Not labeled in
ornamental plantings
18
Karmex

• Several formulations
• Diuron 4L
• Diuron 80DF (aka Karmex now sold by Griffin LLC)
• Diuron 80WDG
• Diuron 80W

19
Treatment List

• Product Rate Diuron
• (oz/ac) (lb/ac)
• Untreated --- ---
• Karmex DF 40 2
• Direx 4L 64 2
• MANA-202 (7F) 36.6 2
• MANA-203 (90DF) 35.5 2
• Karmex DF 160 8
• Direx 4L 256 8
• MANA-202 (7F) 146.4 8
• MANA-203 (90DF) 142.1 8

20
Methods and Materials

• Park Ave., University Park
• Applied July 2, 2002
• 3 reps, RCBD
• CO2-powered sprayer w/ single OC-12 nozzle
• 50 GPA
• 1 v/v Touchdown Pro added to each trt.

21
Predominate Species

• Spotted knapweed (Centaurea maculosa)
• Birdsfoot trefoil (Lotus corniculatus)
• Annual dropseed (Sporobolus neglectus)
• White sweetclover (Melilotus alba)

22
Ratings

• Total Cover Ctrl
• Date Cover by Species by Species
• (------------------------------
  -----------)
• Jul 2 v v
• Jul 22 v
• Aug 9 v
• Sep 10 v v
• Oct 15 v v

23

• Product Diuron Cover
• (lbs/ac) Jul 2 Sep 10 Oct 15
• Untreated (not incl) --- 50 50 47
• Karmex DF 2 47 3 13
• Direx 4L 2 45 8 15
• MANA-202 (7F) 2 55 3 25
• MANA-203 (90DF) 2 58 3 37
• Karmex DF 8 50 2 24
• Direx 4L 8 58 1 6
• MANA-202 (7F) 8 47 2 23
• MANA-203 (90DF) 8 50 2 8
• LSD(p0.05) n.s. n.s. n.s.

24
Discussion

• A tremendous amount of spotted knapweed returning
  from seed by the October 15 rating. Variable
  population across the study.
• Untreated check was not included in the
  statistical analysis.
• No significant differences noted among the
  materials tested. All performed equally well.

25
Comparison of Various Pramitol Diuron Mixes for
Bareground Weed Control
26
Objective

• To determine the effectiveness and persistence of
  various Pramitol and Diuron tank mixes.
• Pramitol Diuron 4L
• Agan Chemical Mfg., Ltd.
• Metgard 60 a.i. Metsulfuron
• Makhteshim-Agan

27
Pramitol prometon

• Broad spectrum residual
• Old chemistry
• High rates -
• Pre and post timings

28
Pramitol

• Several formulations available
• Pramitol 2.2L
• Pramitol 25E
• Pramitol 4SC
• Pramitol 5PS
• Pelletized
• Prometon plus, simazine

29
Treatment List

• Product Rate
• (oz/ac)
• Sahara 208
• Pramitol/Diuron 4L 256
• Pramitol/Diuron 4L 256
• Glyphosate 32
• Pramitol/Diuron 4L 256
• 2,4-D 32
• Pramitol/Diuron 4L 256
• Plateau 4
• Pramitol/Diuron 4L 256
• Vanquish 6
• Hi-Dep 18
• Pramitol/Diuron 4L 256
• Metgard 0.5

• Product Rate
• (oz/ac)
• Pramitol/Diuron 4L 640
• Pramitol/Diuron 4L 640
• Glyphosate 32
• Pramitol/Diuron 4L 640
• 2,4-D 32
• Pramitol/Diuron 4L 640
• Plateau 4
• Pramitol/Diuron 4L 640
• Vanquish 6
• Hi-Dep 18
• Pramitol/Diuron 4L 640
• Metgard 0.5
• Krovar I 128
• Untreated ---

30
Methods and Materials

• SR 80W, Centre Co.
• Applied July 10, 2002
• 4 reps, RCBD
• CO2-powered sprayer w/ 6 ft. boom or single OC-12
  nozzle
• 50 GPA

31
Predominate Species

• Spotted knapweed (Centaurea maculosa)
• Crownvetch (Coronilla varia)
• Goldenrod (Solidago. spp.)
• Tall fescue (Festuca arundinacea)

32
Ratings

• Total Cover Ctrl
• Date Cover by Species by Species
• (------------------------------
  -----------)
• Jul 10 v v
• Jul 25 v
• Aug 9 v
• Sep 10 v v
• Oct 21 v v

33
Crownvetch

• Product Rate Total Cover Ctrl Cov
• (oz/ac) Jul 10 Sep 10 Oct 21 Sep 10 Oct 21
• Sahara 208 78 1 1 100 10
• Pramitol/Diuron 4L 256 78 8 21 90 80
• Pramitol/Diuron 4L 256 78 6 25 95 87
• Glyphosate 32
• Pramitol/Diuron 4L 256 88 8 12 97 52
• 2,4-D 32
• Pramitol/Diuron 4L 256 65 4 14 95 74
• Plateau 4
• Pramitol/Diuron 4L 256 71 5 10 98 17
• Vanquish 6
• Hi-Dep 18
• Pramitol/Diuron 4L 256 89 4 7 100 5
• Metgard 0.5

34
Crownvetch

• Product Rate Total Cover Ctrl Cov
• (oz/ac) Jul 10 Sep 10 Oct 21 Sep 10 Oct 21
• Pramitol/Diuron 4L 640 61 7 6 95 74
• Pramitol/Diuron 4L 640 71 3 4 95 75
• Glyphosate 32
• Pramitol/Diuron 4L 640 60 2 1 98 70
• 2,4-D 32
• Pramitol/Diuron 4L 640 58 1 1 98 78
• Plateau 4
• Pramitol/Diuron 4L 640 80 1 2 98 88
• Vanquish 6
• Hi-Dep 18
• Pramitol/Diuron 4L 640 75 1 1 100 0
• Metgard 0.5
• Krovar I 128 85 7 22 94 63
• Untreated --- 93 79 76 0 39

35
Discussion

• 3 months after application there was no
  significant difference in vegetative cover among
  treatments.
• Trend toward 5 gal/ac to provide more complete
  control than 2 gal/ac.
• Adding 0.5 oz/ac Metgard helped reduce crownvetch
  cover.
• This premix provided control comparable to
  industry standards.