Pre-Emergent Weed Control In Landscape Situations. Al Borgen Wilbur-Ellis Company Wilsonville, Oregon

Transcription

1 Pre-Emergent Weed Control In Landscape Situations Al Borgen Wilbur-Ellis Company Wilsonville, Oregon

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4 Factors Affecting Good Control Water Quality Timing of Application Age of Spray Material Site Considerations Rate of Application Application Uniformity Irrigation Considerations Target Weeds.

5 Benefits of pre-emergent control Never see the weed! Little or No hand labor! No competition to established turf, trees or ornamentals. No dead carcasses. Reduced complaints from customers! It s using IPM techniques The site looks good

6 What does it take to have Good Pre-Emergent Weed Control?? The right products for the job Weed ID needed Applied at optimum timing Prior to weed germination Usually twice a year Moisture to activate herbicide inch in one event is optimum

7 What does it take to have Good Pre-Emergent Weed Control?? Spraying and Spray equipment The right nozzles for the job Calibrated equipment Agitation usually needed

8 How are Weeds Controlled by Pre-Emergent Herbicides Timing of application Weeds Susceptibility to the herbicide Placement of herbicide: Zone or Barrier

9 Jan Feb March April May June July Aug Sept Oct Nov Dec Spring germination Fall germination Spring Preemerge applications Residual Fall Preemerge applications Residual Residual

10 Herbicide action in the Soil Preemergent herbicides set up a zone or barrier in the soil that prevents seeds from developing by disrupting their development.

11 Landscape Pre-emergent Herbicides action in the Soil Dimension* Gallery* DF Snapshot* TG Treflan* (Preen) Surflan AS XL 2G Barricade Pendulum These create a zone within the soil profile. Control is by their affects on the root system of the germinating weed seed.

12 Shoot development Seed Root development

13 Landscape Pre-emergent Herbicides action in the Soil Dimension* Gallery* DF Snapshot* TG Treflan* 5G Surflan AS XL 2G Barricade Pendulum

14 Landscape Pre-emergent Herbicides action in the Soil Dimension* Gallery* DF Snapshot* TG Treflan* 5G Showcase* Surflan AS XL 2G Barricade Pendulum Depth Relative downward Movement of Products 0.5" Barricade 0.6" Dimension 1-2" Gallery

15 Herbicide action in the Soil with Casoron and Ronstar These create a barrier on the soil surface and control the weed as they emerges through that barrier. These can not be disturbed after applications or the zone is lost. Weeds can emerge from this disturbed area

16 Weeds can grow here

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18 May NOT be Treated Treated

19 Weed Pressure on EDGES

20 Crabgrass Weeds Growing on the Edge of the turf 12 to 18 Applied here Pre-emergent Applications Spurge

21 When do you start the Weed Control? 4- Spread bark 2- Grade area Plant shrubs 3- Apply pre-emergent 1-Spray existing weeds out first

22 Weed Control in Landscape sites

23 Pre-Emergent weed control Beds Brick Pavers

24 Infield Weed Control

25 What type of Products should be used here??

26 Chemical run Off

27 What is a Sensitive Site? Parking lot, Driveway, Cart path, Gravel area Is anyplace you can get into trouble if the herbicide either drifts, run, leaches or moves into contact with any portion of a desirable plants Chemical damage from other side of Wall

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31 If you use the Wrong Product

32 Miss Use of: Krovar or Spike

33 Casoron

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35 Glyphosate Damage

36 Problem Solver Help From Extension Service

37 Why Calibrate?? Why Spread Product Evenly?? Mistakes Cost Money

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39 Actual Application Patterns

40 Actual Application Patterns This is one reason weeds grow on the edges

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42 Navy Seal!

43 What is the best way to apply Granules

44 For Broadcast Applications

45 Spread-Rite Applicator Good for small irregular shaped sites

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48 Dow AgroSciences Pre-Emergent Herbicides for Landscapes and Turf

49 Dimension* Herbicide Controls Grasses and Many Broadleaf Weeds in TURF, Landscapes and Nursery Low Odor Low active ingredient load No-Yellow or Orange Colored Newer Chemistry

50 New Formulation Dimension 2 EW 2 lbs ai per gallon Container Sizes: 0.5 gallon 2.5 gallon 30 gallon web site:

51 Dimension Application- No COLOR in the Spray

52 Grasses Controlled by Dimension* West of the Cascades Annual Bluegrass- Poa Crabgrass Ryegrasses Brome grasses Barnyard grass Foxtail Most grasses from seed

53 Annual Bluegrass Poa

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55 Dimension Applied 3x a year as a Poa preventative

56 Dimension* -- Dithiopyr Broadleaf Weeds Controlled

57 Broadleaf Weeds on Labels Common Name Dimension* Pendulum Barricade Gallery Bittercress X X Black Medic X X Burweed X X Oxalis X X Carpet weed X X X X Chickweed X X X X Eveningprimros X X Fiddleneck X X Filaree X X Geranium X X Henbit X X X X Hop Clover G X X Knotweed X X X Kochia G X X X Lespedeza X

58 Why use Dimension? Dimension is the BEST product for the job! Excellent Control of Grassy weeds Better Broadleaf weed control than: Surflan, Pendulum, Barricade Tank-Mixable with: Gallery, Glyphosate & others Safe on Turf and Landscapes

59 Dimension* 2EW Rates Per Acre Turf Areas Low 1 pint 0.25 lb ai Mid 1.5 pints 0.38 lb ai Landscape Areas All sites 2 pints 0.5 lb ai High 2 pints 0.5 lb ai

60 Dimension 2 EW Warning label- Re-entry: when dry- Landscape-turf 12 hours- WPS- Ag/Nursery/Sod Supplemental label : Nursery containers More labeled species for Over the Top Apps.

61 Dimension Granular Label

62 Gallery* 75 DF Excellent Broadleaf weed control for Landscapes and Turf

63 Weeds Control by Gallery* DF

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65 Gallery* Use Rates Rates: 0.66 to 1.3 pounds per acre Mid Rate- 1 lb per Acre 3/8 oz per 1000 sq. ft. (1 cap full) gives 6+ months control (Length of control varies with many conditions)

66 Dimension + Gallery Tank-Mix BEST possible total Weed control Program ALL Season long Control Grasses controlled by Dimension Broadleaf control expanded by combination Little or no follow up needed Time can be spent doing other jobs The cost will be recuperated many times over

67 Case Study on How to SAVE MONEY by using GALLERY Actual Numbers by Pendleton Parks Department

68 How to overcome some Budget needs Prevent the problem before it happens Pay up front.. If you don t, You will pay more later Hand weeding is Expensive

69 Real Example of Saving Money by using Pre-Emergent Herbicides Weed Pressure in the Turf areas

70 Treated Notice the Weed PRESSURE

71 Reactive vs. Proactive Weed Control Post emerge applications: Round-up and 2-4-D amine with sticker. Labor to spray one time: $16.00 / hr. = $1280 Total cost of chemical used to spray one time. Equals $ Total cost to spray all landscape areas one time. $ These areas will be sprayed on average of 5 times a year to control weeds. Total cost per growing season. $8,840.00

72 Reactive vs. Proactive Weed Control Round up, 2-4-D amine + sticker AND Pre emerge with: Gallery 75 DF Total cost to spray all areas one time. vs. $ $ Gallery was applied one time in all areas, but some areas required two applications of Round up to control some perennials so they also added the Gallery.

73 Proactive Weed Control Kept it clean all year

74 Reactive vs. Proactive More MONEY, More TIME SAVINGS: MONEY TIME. (From One application) $ & 320 hours for other work If all Sprayed 2 x (because of weed pressure) Still SAVED: $ & 240 hours for other work

75 Pre-Emergent Herbicide Applications Saved Time Did NOT have to do multiple applications on same site Saved MONEY The Man hours were used for something else Total chemical cost about the same

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77 Snapshot* 2.5 TG GRANULAR Herbicide Excellent control of Annual Grasses and Broadleaf Weeds Landscape Shrub beds bare ground areas Nurseries- Field grown and Containers

78 Snapshot* 2.5 TG Combination of TWO herbicides Treflan- grass control Gallery- Broadleaf control Will NOT burn plant foliage Great for the small jobs or hard to spray areas 200 lb./acre or 5 lb./1000 sq. feet

79 Applied by HAND- notice different concentrations

80 Applicators

81 150 # Rate of Snapshot

82 WOULD YOU BE INTERESTED?? Warning label with re-enter when dry 12 hour REI (Ag) Visible results within minutes reseeding/planting right after weeds die Non-volatile, non-translocated, nonresidual active only on green tissue contacted by the spray, and rapidly degraded in soils

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84 Scythe* Herbicide Is an environmentally agreeable burn down weed control product offering the following attributes and usage sites?

85 Scythe* Herbicide SCYTHE HERBICIDE (Pelargonic acid) For general use at 3-5% dilution with water to burn down annual weeds Use 5-7% dilution in water for perennial herbaceous burn down Also controls moss and algae!

86 Before Scythe Application 71 degree temp After- 24 hours

87 Scythe Application Before The Next Day

88 WOULD YOU BE INTERESTED?? Labeled Use sites Landscapes & Shrub areas Greenhouses and nurseries School areas, Industrial sites, public areas, walkways Dry aquatic and drainage areas 72 hours before re-flooding Sucker control on trees and vines Many Crops sites

89 Scythe* Herbicide SCYTHE accelerates activity of glyphosate herbicides (Glypro, Roundup etc) when 1-3% of spray solution.

90 Low Bid Sign Maker!

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92 Questions??? Thanks for your Time

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