Weed Control in Landscape Beds. Nicole Mason-Hendrickson Mark M. Holeman, Inc Jan. 2008

Transcription

1 Weed Control in Landscape Beds Nicole Mason-Hendrickson Mark M. Holeman, Inc Jan. 2008

2 Types of Weed Control Chemical Pre-emergent emergent Post-emergent Barriers Cultural Methods Pulling Weed torch?

3 Types of Ornamental Herbicides Pre-emergents emergents Broadleaf weeds Grassy weeds Post emergents Broadleaf weeds Grassy weeds

4 Pre-Emergent Herbicides Granular Snapshot Treflan Dimension G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant

5 Granular Treflan Snapshot Dimension G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant Trifluralin 5% treflan at 1.8 lbs/1000 sq ft. Activate with.5 inch rainfall, incorporate into soil, or cover Activate within 3 days Repeat application in 60 days Can use in spring bulb beds

6 Granular Treflan Snapshot Dimension G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant Treflan Do not use with glad corms Do not apply to newly planted ornamentals or groundcovers until soil has settled and no cracks are present PPE required: eye protection, long sleeved shirt, impermeable gloves

7 Treflan controls Annual bluegrass, crabgrass,, foxtail, goosegrass, wild oat, fall panicum, witchgrass plus a few others Chickweed,, knotweed, lambsquarters, nettle, purslane Treflan Suppresses Carpetweed, johnsongrass, shattercane

8 Granular Treflan Snapshot Dimension G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant Trifluralin + Isoxaben 2.5% snapshot at 2.3 lbs, 3.45 lbs or 4.6 lbs/1000 sq ft depending on weed species Activate with.5 inch rainfall, incorporate into soil, or cover Activate within 3 days Repeat application in 60 days Can be applied to spring bulbs weeks after planting

9 Granular Treflan Snapshot Dimension G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant Snapshot Do not use with glad corms Do not apply to flowering bulbs Do not apply to newly planted ornamentals or groundcovers until soil has settled and no cracks are present PPE required: long sleeved shirt, long pants, and shoes plus socks

10 Snapshot Controls at 2.3 lbs/ 1000 sq ft Annual bluegrass, barnyardgrass,, crabgrass, yellow foxtail,, fall panicum, wild oats, witchgrass Common chickweed, fleabane, henbit,, prostrate knotweed, lambsquarters, wild mustard, nightshade, pigweed, pineapple weed, slender plantain, purslane, ragweed, shepherdspurse, smartweed, speedwell

11 Snapshot controls at 3.5 lbs/ 1000 sq ft Giant foxtail,, lovegrass, annual ryegrass Bittercress, wild carrot, mouseear chickweed, dandelion, groundsel, prickly lettuce, mallow, marestail, ivyleaf morningglory, pennywort, broadleaf and buckhorn plantain, pokeweed, red sorrell, spotted spurge, velvetleaf, yellow woodsorrel

12 Snapshot controls at 4.6 lbs/1000 sq ft Hare barley, bromegrass, goosegrass,, signalgrass, stinkgrass Evening primrose, jimson weed, black medic,, nettle, prostrate spurge, sunflower, musk thistle, creeping woodsorrel

13 Snapshot suppresses at 4.6 lbs/ 1000 sq ft Johnsongrass,, Texas panicum, shattercane Field bindweed, carpetweed, curly dock, honeyvine milkweed, tall morningglory

14 Snapshot has been shown to injure the following ajuga,, mustards, luxuriant bleeding heart, foxglove, coneflower, dwarf burning bush, euphorbs, ballerina cranesbill geranium, baby s breath, hydrangea, candytuft, Prince of Wales juniper, summer phlox, lungwort, Carolina rhododendron, Roseum elegans rhododendron, sedum, periwinkle, yucca

15 Granular Treflan Snapshot Dimension.25 G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant Dithiopyr.25% dimension at 4.6 lbs /1000 sq ft depending on weed species Irrigate immediately after application to wash product off ornamentals If doing split application, repeat after weeks Can be applied to spring flowering bulbs

16 Granular Treflan Snapshot Dimension.25 G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant Dimension Do not disturb soil after application Do not apply to newly planted ornamentals or groundcovers until soil has settled and no cracks are present See label for tolerant ornamental species PPE required: not sure

17 Dimension controls Barley, barnyardgrass,, annual bluegrass, brome, large and smooth crabgrass, crowfootgrass, dallisgrass, goosegrass, yellow and green foxtail,, wild oats, annual and perennial rye Bittercress,, carpetweed, chickweed, geranium, henbit, knotweed, lespedeza, marestail,, black medic, mustard, buttercup oxalis, pineappleweed,, redroot pigweed, parsley-piert piert, purslane,, London rocker, shepherd s purse, corn speedwell, spurges, creeping and yellow woodsorrel

18 Granular Treflan Snapshot Dimension G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant Corn Gluten Organic weed control 60% corn gluten mixture covers 20 lbs/ 1000 sq ft or a 50 lb bag covers 2,500 sq ft 60% effective Weeds become susceptible to dehydration because the gluten prevents development of normal roots

19 Corn Gluten Helps control crabgrass, dandelions, annual bluegrass, black medic, buckhorn plantain, black nightshade, lambsquarters, foxtail, purslane, and pigweed, creeping bentgrass, curly dock

20 Granular Treflan Snapshot Dimension G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant Oryzalin 41% oryzalin at 1.5 to 3 oz lbs/1000 sq ft depending on length of control desired Oryzalin is orange Activate with.5 inch rainfall or incorporate into soil Activate within 21 days Repeat application in 2 to 8 months (rate dependant) Can be applied to spring bulbs weeks after planting

21 Granular Treflan Snapshot Dimension G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant Oryzalin Do not use with glad corms Do not apply to flowering bulbs Do not apply to newly planted ornamentals or groundcovers until soil has settled and no cracks are present PPE required: long sleeved shirt, long pants, shoes plus socks, chemical- resistant gloves Mixers and loaders must also wear chemical resistant apron

22 Oryzalin controls Little barley, barnyardgrass,, annual bluegrass, large and smooth crabgrass, crowfootgrass, foxtails, goosegrass, johnsongrass, lovegrass, wild oat, fall panicum, sprangletop, witchgrass Bittercress, carpetweed, common chickweed, groundsel, henbit, pigweed, puncturevine, purslane, shepherdspurse, prostrate spurge, yellow woodsorrel

23 Oryzalin suppresses Prickly lettuce, common mallow, climbing milkweed, morningglory,, mustard, nightshade, ragweed, smartweed, annual sowthistle, spotted spurge, velvetleaf Plants sensitive to oryzalin Deutzia, Douglas fir, some arborvitae, eastern hemlock, begonia,, coleus

24 Granular Treflan Snapshot Dimension G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant Isoxaben Gallery 75 DF at oz/1000 sq ft. Activate with.5 inch rainfall or incorporate into soil Activate within 21 days Repeat application in 60 days Agitation needed to keep material suspended in water Can use in fall planted bulbs weeks after planting

25 Granular Treflan Snapshot Dimension G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant Gallery Do not use with glad corms or flowering bulbs Do not apply to newly planted ornamentals or groundcovers until soil has settled and no cracks are present Do not apply to a landscape if being planted within a year (if it has been treated use new soil as a backfill) PPE required: long sleeved shirt and pants, shoes plus socks

26 Gallery controls at.25 oz/1000 sq ft Slender aster, wild celery, common chickweed, white clover,, fleabane, groundcherry, henbit, prostrate knotweed, lambsquarters, little mallow, wild mustard, black nightshade, pigweed, pineapple weed, slender plantain, common purslane, ragweed, shepherdspurse, smartweed, sowthistle, purslane speedwell

27 Gallery controls at.38 oz/1000 sq ft Heath aster, bittercress, wild carrot, mouseear chickweed,, dandelion, prickly lettuce, dwarf mallow, marestail, ivyleaf morningglory, black mustard, pennywort, plantain, pokeweed, red sorrell, thymeleaf speedwell, spurge, yellow sweetclover, yellow woodsorrel

28 Gallery controls at.5 oz/1000 sq ft Evening primrose, goosefoot, groundsel, jimsonweed, knotweed, kochia,, black medic, mullein, spiny sowthistle, prostrate spurge, sunflower, swinecress, musk thistle, creeping woodsorrel

29 Gallery suppresses at.5 oz/1000 sq ft Field bindweed, carpetweed, curly dock, honeyvine milkweed, tall morningglory Plants sensitive to gallery Ajuga, mustard, purple coneflower, dwarf burning bush, euphorbs, hydrangea, prince of Wales juniper, Carolina rhododendron, roseum elegans rhododendron, sedum, yucca

30 Granular Treflan Snapshot Dimension G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant Prodiamine Barricade 65WG at oz/1000 sq ft. The higher rate gives longer control Activate with.5 inch rainfall or incorporate into soil Activate within 14 days Agitation needed to keep material suspended in water Safer on perennials and wildflowers Can use in some fall planted bulbs

31 Granular Treflan Snapshot Dimension G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant Barricade Do not use on flowering bulbs Can be applied to newly planted ornamentals and groundcovers after transplants have been watered and soil has settled PPE required: Non-WPS waterproof gloves. WPS- Long-sleeved shirt and pants, shoes plus socks, and waterproof gloves.

32 Barricade controls Barnyardgrass, annual bluegrass, large and smooth crabgrass, crowfoot grass, woolly cupgrass, foxtails, goosegrass, itchgrass, johnsongrass, lovegrass, panicum, broadleaf signalgrass, sprangletop, witchgrass Carpetweed, common and mouseear chickweed, henbit, knotweed,, kochia, common lambsquarters, pigweed, common purslane, shepherd s- purse, Persian speedwell, prostrate spurge, yellow woodsorrel

33 Granular Treflan Snapshot Dimension G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant Dithiopyr Dimension EC at.1.5 oz/1000 sq ft. Activate with.5 inch rainfall Repeat in months Only use on established ornamentals Do not apply as an over- the-top top spray Can use in some fall planted bulbs

34 Granular Treflan Snapshot Dimension G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant Dimension Do not use with glad corms or flowering bulbs Do not apply to weakened and stressed plants PPE required: coveralls over short sleeved shirt and pants, chemical resistant shoes plus socks, protective eyewear, chemical resistant gloves Mixers and loaders must also wear chemical resistant apron

35 Dimension controls Barley, barnyardgrass,, annual bluegrass, brome, large and smooth crabgrass, crowfoot grass,, goosegrass, green and yellow foxtail, wild oats, annual and perennial ryegrass, sandbur, smutgrass Bittercress, carpetweed, chickweed, henbit, prostrate knotweed, lespedeza, marestail, black medic, mustard, buttercup oxalis, pineapple weed,, redroot pigweed, parsley-piert, piert, purslane, London rocket, shepherd s-purse, purse, corn speedwell, spurges, woodsorrel

36 Granular Treflan Snapshot Dimension G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant S-metolachlor Pennant Magnum at ml/1000 sq ft. depending on soil texture Activate with.5 inch rainfall Repeat in months Wait until soil settles before application When used as an over-the top, follow with irrigation to wash off plants

37 Granular Treflan Snapshot Dimension G Corn Gluten Liquid Spray Surflan Gallery Barricade Dimension EC Pennant Pennant Can use in fall planted bulbs Do not apply to weakened and stressed plants PPE required: long-sleeved shirt and pants, shoes plus socks, chemical resistant gloves

38 Pennant Controls Annual bluegrass, barnyardgrass,, crabgrass, crowfootgrass,, fall panicum,, foxtail millet, foxtails, goosegrass, prarie cupgrass, signalgrass, witchgrass Black and hairy nightshade, carpetweed, galinsoga, pigweed Yellow nutsedge

39 Post-emergent Herbicides Broad Spectrum Round-up up Broadleaf Herbicides Lontrel Grassy Herbicides Fusilade II Acclaim NutSedge Sedgehammer

40 Post-emergent Herbicides Broad Spectrum Round-up up Broadleaf Herbicides Lontrel Grassy Herbicides Fusilade II Acclaim NutSedge Sedgehammer Glyphosate Round up different rates depending on application (2-10% solutions) Non-selective herbicide Use on actively growing plants Moves from foliage to root system Can use as a cut stump treatment

41 Post-emergent Herbicides Broad Spectrum Round-up up Broadleaf Herbicides Lontrel Grassy Herbicides Fusilade II Acclaim NutSedge Sedgehammer Round-up up No soil activity PPE required:long- sleeved shirt, long pants, and shoes plus socks

42 Post-emergent Herbicides Broad Spectrum Round-up up Broadleaf Herbicides Lontrel Grassy Herbicides Fusilade II Acclaim NutSedge Sedgehammer Clopyralid Apply at 1/10-1/2 1/2 fl oz per 1000 square foot Broadleaf herbicide: works very well on thistle Do not use broadcast applications spot applications only Can be taken in through foliage or roots Do not apply to shallow rooted trees and shrubs

43 Post-emergent Herbicides Broad Spectrum Round-up up Broadleaf Herbicides Lontrel Grassy Herbicides Fusilade II Acclaim NutSedge Sedgehammer Lontrel Delay cultivation for days Do not seed into soil for three weeks Do not rotate susceptible broadleaf plantings for 10.5 months PPE required: long-sleeved shirt, long pants, shoes plus socks, protective eyewear, and chemical resistant gloves

44 Post-Emergent Herbicides Use lontrel in established plantings of: Flowering dogwood,, some firs, red maple, red and willow oak, some pines, some spruce, sycamore Arborvitae, hino-crimsom azalea, littleleaf boxwood, cinquefoil, some junipers, mugo pine, roseum- elegans rhododendron, taxus Many grass species, lillies, bulbs

45 Post-emergent Herbicides Broad Spectrum Round-up up Broadleaf Herbicides Lontrel Grassy Herbicides Fusilade II Acclaim NutSedge Sedgehammer Fluazifop Apply at.4 to.6 fl oz per 1000 square foot, spot spray.75 oz/ gal Use with nonionic surfactant (.5 oz/ gal) unless spraying over ornamentals No mowing within 7 days Cultivate weeks prior to application for improved weed control Apply to actively growing grasses

46 Post-emergent Herbicides Broad Spectrum Round-up up Broadleaf Herbicides Lontrel Grassy Herbicides Fusilade II Acclaim NutSedge Sedgehammer Fusilade Best control when applied to young actively growing grasses not under stress PPE for applicators: long- sleeved shirt and pants, shoes plus socks, chemical resistant gloves PPE for mixers and loaders: long-sleeved sleeved shirt and pants, shoes plus socks, chemical resistant gloves, protective eyewear, chemical resistant apron

47 Post-emergent Herbicides 20% phytotoxicity on: Heavenly bamboo, ajuga, ceonanthus, cinquefoil, columbine, leyland cypress, frasier fir, gazania, Japanese honeysuckle, some junipers, lilac, red maple,, some viburnum, willow 50% on: Bleeding heart, some junipers, primrose, some rhododendrons, Over 50% on River birch,, winged euonymus, pampas grass, some junipers

48 Post-emergent Herbicides Broad Spectrum Round-up up Broadleaf Herbicides Lontrel Grassy Herbicides Fusilade II Acclaim NutSedge Sedgehammer Fusilade controls: Barnyardgrass, bermuda grass, signalgrass, large and smooth crabgrass, downy brome, foxtails, goosegrass, ryegrass, johnsongrass, prairie and wooly cupgrass, quackgrass, rice, shattercane, sorghum, panicums, volunteer cereals, oats

49 Post-emergent Herbicides Broad Spectrum Round-up up Broadleaf Herbicides Lontrel Grassy Herbicides Fusilade II Acclaim NutSedge Sedgehammer Fenoxaprop Apply at.3 to.46 fl oz per 1000 square foot, or per gallon H2O depending on growth stage Addition of a surfactant will improve spray coverage Repeat every 28 to 35 days for tough to control grassy weeds Apply to young, actively growing grasses

50 Post-emergent Herbicides Broad Spectrum Round-up up Broadleaf Herbicides Lontrel Grassy Herbicides Fusilade II Acclaim NutSedge Sedgehammer Acclaim Can be used over many different types of plants Stunting or chlorosis may occur on rapidly growing ornamentals PPE for applicators: long- sleeved shirt and pants, shoes plus socks Will control: Crabgrass, goosegrass, foxtail, panicum

51 Post-emergent Herbicides Broad Spectrum Round-up up Broadleaf Herbicides Lontrel Grassy Herbicides Fusilade II Acclaim NutSedge Sedgehammer Halosulfuron Apply at 0.9 gram/ 1000 square foot Add a nonionic surfactant at 2 tsp/ gal H2O Repeat applications may be necessary Can mix with glyphosate Apply to nutsedge in the leaf stage

52 Post-emergent Herbicides Sedgehammer Do not apply as an over the top spray PPE for applicators: long-sleeved shirt and pants, shoes plus socks Will control: Purple and yellow nutsedge Equisetum at double rate

53 Barriers Landscape weed barrier Allows for water penetration Weeds with tap roots can penetrate and be hard to pull Mulch over top to hide barrier weeds will grow on top Plastic No water penetration Not for use around plants Mulch over top weeds in mulch Limited life

54 Mulches Can be put down too thick especially around perennials Weeds will grow through mulch Types Hardwood Different grades will break down at different rates Cypress Will not break down Pine straw Stone Rubber Barriers

55 Hand pulling Cultural Weed Control Costly Some plants with strong roots are hard to pull Weeds with rhizomes difficult to control Safe around desired plants Tools Weeding forks help to get the deep roots Hoes leave to the garden Torch? Use with caution around plants and mulch

56 Final Thoughts Know the common weeds you are fighting Read product labels Know what weeds and plants are on it Use the proper rates Any perennial weed already there will not be controlled by a pre-emergent emergent Use post-emergent or pull prior to application Continually monitor the landscape beds It s easier to control a few weeds early than wait for mass emergence Don t forget safety Wear your PPE Be cautious of other people around you