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Spring Lawn Care

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Spring Lawn Care – PowerPoint PPT presentation

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Title: Spring Lawn Care


1
Spring Lawn Care
  • February 2008

2
Turf in late winter and spring
  • Bermudagrass often dormant
  • St. Augustine doesnt go dormant
  • Fescue grows through winter
  • Spring regrowth typically starts earliest in the
    southeast in Oklahoma

3
Turf in late winter and springTheress always
exceptions!
  • Bermudagrass often dormant
  • May not be this year!

4
Turf in late winter and springThere may be
winter annual weeds
  • Herbicides such as Trimec may be used
  • Do not use Roundup if bermudagrass not dormant!

5
Turf in late winter and springWhen should I
fertilize?
  • If you fertilize now, you are fertilizing the
    weeds
  • It is a little early to encourage bermuda growth

6
Turf in late winter and springWhen should I
fertilize?
  • Now is a good time to soil test
  • This will tell you your fertilizer needs for April

7
Fertilization Programs
  • bermudagrass
  • 5 lb N/1000 sq ft/season
  • Apply 1 lb N/1000 in May, June, July, August,
    September if quick release N is used
  • Blended sources containing slow release
    fertilizer can be applied at 1.6 lbs N/1000,
    each, in May, July and Sept
  • buffalograss and zoysiagrass
  • 2-3 lb N/1000 sq ft/season
  • applied in single 1 lb N/1000 sq ft applications

8
Fertilization Programs
  • cool-season grasses
  • 3-4 lb N/1000 sq ft/season
  • October, December, March, early May
  • Do not fertilize in June August to reduce heat
    and drought stress and risk of brown patch
    disease

9
Turf in late winter and springWhen should I
fertilize?
  • Now is a good time to soil test
  • This will tell you your fertilizer needs for April

10
Turf in late winter and springTheress always
exceptions!
  • St. Augustine doesnt become truly dormant

11
Turf in late winter and springTheress always
exceptions!
  • St. Augustine may be very green in protected
    areas picture Feb 19 , 2008

12
Turf in late winter and springTheress always
exceptions!
  • Never use Roundup on St. Augustine
  • Even if it looks dormant

13
Turf in late winter and springTheress always
exceptions!
  • St. Augustine
  • Now is a good time to mow as short as possible
  • Remove clippings
  • Help prevent take-All disease

14
Turf in late winter and springTheress always
exceptions!
  • St. Augustine fertilization
  • As with bermudagrass, wait until April to
    fertilize
  • Soil test now

15
Turf in late winter and springTheress always
exceptions!
  • St. Augustine
  • Keep it watered even though it is not green

16
St. Augustinegrass
  • Full-sun to lightly-shaded areas of south eastern
    OK. Not found much north of McAlester-Poteau
    areas
  • High water requirement
  • Better soil conditions required
  • Use only Raleigh at this time
  • Raleigh is cold hardy
  • St. Augustine Decline virus resistant
  • Susceptible to Take-all disease
  • Expect occasional winter-kill
  • Water
  • Cold

17
Centipede
  • Vegetative
  • Slow establishment
  • By seed VNS
  • Marginal cold tolerance
  • Southern Oklahoma?
  • Oklawn
  • Tenn. Hardy available?
  • Light shade to full sun

18
Zoysiagrass
  • warm-season grass
  • fine to medium-texture
  • yellow green color
  • stolons and rhizomes
  • winter hardy
  • full-sun to light-shade
  • requires less fertilizer
  • requires less mowing
  • requires more waterthan bermudagrass, but
    lessthan tall fescue

19
Lawn Weed Control
20
Weed Control
  • Identify your weeds
  • Modify management program to favor desired grass
    over the weed
  • Small numbers of weeds can be tolerated or
    removed by hand
  • Select herbicides to control weeds and not injure
    turf (Read the Label!!!!!)

21
  • apply herbicide when conditions favor
  • Preemergence - germination
  • Postemergence - rapid weed growth
  • apply at the recommended
  • time
  • rate
  • coverage

22
Common Winter Annual Grassy Weeds
  • annual bluegrass (Poa annua)
  • downy brome, cheat, rescuegrass

Annual bluegrass
23
Winter Annual Broadleaf Weeds
Carolina geranium
henbit
Creeping speedwell
24
Winter Annual Broadleaf Weeds
Lawn burweed or spurweed
Mouse-ear chickweed
Common chickweed
25
Summer Annual Grassy Weeds
crabgrass
Crabgrass seedlings
goosegrass
26
Summer Annual or Perennial Grassy Weeds
  • sandbur

27
Perennial sedges
  • Yellow nutsedge (left)
  • Purple nutsedge (right)

28
Post-emergent nutsedge control
  • Image use only on warm-season lawns
  • MSMA use only certain on warm-season lawns
    not on St. Augustine and others!!!!
  • Basagran warm or cool-season lawns
  • Sedge-Hammer warm or cool-season lawn
  • Only Image and Sedge-Hammer will control both
    yellow and purple nutsedge, the others will not
    control purple nutsedge

29
Warm-season Perennial Grassy Weeds
  • dallisgrass

30
Cool-season Perennial Broadleaf Weeds
  • Violet

31
Chemical Weed Control
  • pre-emergent - applied to kill weeds at
    germination
  • post-emergent - applied to actively growing weeds

Left received no pre-emergent herbicide yellow
color is due to large amounts of crabgrass Right
has received pre-emergent that is providing good
control of crabgrass.
32
Sodding
  • provides almost instant lawn
  • moist seedbed
  • place in staggered,
  • checkerboard pattern,
  • fit snugly
  • tamp or roll area
  • water immediately
  • warm-season in full sun, lay sod at least 1 month
    prior to first fall frost, in shade, lay sod at
    least 2.5 months prior to first fall frost
  • Cool-season do not sod in June-Aug.

33
Choose quality sod a good roll or slab ofsod
can be picked upby its end and will not break
under itsown weight
34
Plugging
  • transplant small pieces of sod (1-2), use only
    those grasses that spread by stolons
  • used when transplant shock to sprigs will be
    excessive.
  • requires more time for total coverage
  • more labor intensive
  • 6-12 centers (zoysiagrass - 6)
  • roll or tamp, keep moist
  • plug at least 2 months before first fall frost

35
Spring Dead Spot disease
  • fungus, active in fall
  • damage appears in spring
  • avoid late, high applications of N
  • chemical controls not reliable
  • remove dead plant material to speed up regrowth
  • allow remaining grass to cover or reseed/ plug
    with resistant cultivars

36
Dollar Spot disease
  • Small circular spots size of silver dollar appear
    in turf
  • N deficiency
  • chemical control

37
Brown Patch
  • Most prevalent on tall fescue
  • Disease severity increases with reduced air
    movement, high temps (80), high humidity, heavy
    dew, summer fertilization, heavyshade
  • Fungicides oftennecessary

38
Mowing Height
  • Cool-season
  • inches
  • fall and spring 2 - 2 1/2
  • summer 2 3suitable for tall fescue,
    Kentucky bluegrass, perennial ryegrass and their
    mixtures

39
Thatch Control
  • manage through propermowing, fertilization,
    watering, and responsible pesticideuse
  • if thatch is greater than1/2 deep, then
    dethatch
  • warm-season grassesprior to spring greenup
  • cool-season grasses in early fall

Excessive thatch in plug onthe left
Excessive thatch removedfrom a lawn
40
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