lawn presentation for master gardeners
TRANSCRIPT
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Master Gardener Lawns
Cliff RuthExtension Area Agent
NCSU/NCCES
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Select Turf Based on the Following:
• CLIMATE - NC is in the transition zone• TYPE OF LAWN DESIRED - Will lawn be grown for
show, outdoor living, play area, etc.• MAINTENANCE REQUIREMENTS• SITE CONSIDERATIONS - Shade, slope, air circulation,
exposure and other microclimatic effects
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Warm Season Grasses
• BERMUDAGRASS• ZOYSIAGRASS• CENTIPEDEGRASS• ST. AUGUSTINEGRASS• BAHIAGRASS
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Cool-Season GrassesGROW WELL IN SPRING AND FALL; MAY GO
“DORMANT” IN SUMMER
• Tall Fescue• Kentucky Bluegrass• Fine Fescue (creeping red fescue, hard fescue, sheeps
fescue)• Ryegrass (Annual or Perennial)• Bentgrass
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Starting a New Lawn
• Cool-season grasses best planted in the Fall• Warm-season grasses best planted April - July• Good site preparation is essential
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6 Steps to a Healthy Lawn• Select the right grass• Soil test • Plant correctly• Fertilize correctly• Mow correctly• Water correctly
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Planting
• SEEDING• SPRIGGING• PLUGGING• SODDING
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Site Preparation
• CONTROL PERENNIAL WEEDS (EX. BERMUDAGRASS)
• PROPER GRADING AND DEBRIS REMOVAL• LIME AND FERTILIZE ACCORDING TO SOIL TEST
(75# LIME AND 40# 5-10-10)
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Reseeding - Partial Renovation
• GOOD SEED/SOIL CONTACT IS ESSENTIAL• RAKE SMALL AREAS• CORE AERATION FOR LARGER AREAS• SLIT SEEDER
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Irrigation
• IT IS DIFFICULT TO EFFECTIVELY IRRIGATE WITHOUT A PERMANENT SYSTEM
• CONSIDER ALLOWING COOL-SEASON TURF TO GO DORMANT
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Irrigation
• IMPROPER IRRIGATION RESULTS IN WASTE, ADDED COST, AND UNHEALTHY PLANTS
• APPLY WATER AT FIRST SIGNS OF MOISTURE STRESS
• EARLY MORNING (2-8 AM) IS THE BEST TIME TO IRRIGATE
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Irrigation
• ESTABLISHED LAWNS SHOULD BE WATERED TO A DEPTH OF 4-6 INCHES OR APPROXIMATELY 1” PER WEEK (640 GALLONS PER 1000 SQ. FT.)
• KEY FOR NEW LAWNS…KEEP TOP 1/2 INCH MOIST. GRADUALLY WEAN TURF AFTER 15 TO 20 DAYS
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Water deeply
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Mowing
• PROPER MOWING IS KEY TO LONG-TERM LAWN SURVIVAL
• CLEANEST CUT AND BEST MOWING IS OBTAINED WITH SHARP BLADES
• MOW OFTEN ENOUGH THAT NO MORE THAN 50% OF LEAF SURFACE IS REMOVED
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Mowing
• TALL FESCUE AND KY. BLUGRASS SHOULD BE MAINTAINED AT 2.5 TO 3.5 INCHES
• IT IS NOT NECESSARY TO BAG CLIPPINGS UNLESS EXCESSIVE
• CLIPPINGS DO NOT CAUSE THATCH• MOWING TOO LOW = WEEDS!
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Mow cool season grass taller for larger root system
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Correct mowing height
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Mowing height = best weed control
2 ½”2”1 ½”
1”
½”
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Reasons to leave clippings on the lawn
• Less work• No longer accepted in
NC landfills• Acts as mulch:
– Moisture retention– Weed suppression
Nutrient recycling
100 lb dry clippings:
4 lb. N½ lb. P3 lb. K
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Fertilization
• SOIL TEST EVERY 2-3 YEARS• AVOID FERTILIZING COOL SEASON GRASSES
AFTER LATE MARCH AND BEFORE LATE AUGUST• HOLIDAY REMINDERS: VALENTINES DAY, LABOR
DAY, AND THANKSGIVING DAY
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LIME
• MOST UNLIMED NC PIEDMONT AND MOUNTAIN SOILS ARE ACIDIC (PH 5.5 OR LESS)
• ALL TURFGRASSES EXCEPT CENTIPEDEGRASS GROW BEST AT 6.0 TO 7.0
• LIME RAISES PH AND PROVIDES CA AND MG
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Correct soil pH according to plant needs
Healthy roots: ahealthy plants
adrought tolerance
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Coring (Aerification)
• Best method to reduce compaction & improve water penetration
• Use hollow tines which remove plugs• Core during active growth
– Quick recover
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Weed Control
• Winter Annuals (Ex. Annual bluegrass, chickweed, wild onions, and henbit)
• Summer Annuals (Ex. Wild lespedeza, crabgrass, and goosegrass, foxtail)
• Perennials (Ex. White clover, dandelions, and plantains)
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Weed Biology• Identifying Weeds by Life Cycle (page 51)
Biennial weedscomplete a life
cycle in 2 years.
Perennial weedspersist from yearto year. They can
be spread by seeds
and regrow from roots, rhizomes,
stolons or tubers.
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Weed Biology
• Identifying Weeds by Life Cycle
Annual weeds complete a life
cycle in a single year.
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:Turf Weed Management• Bahiagrass• Perennial grass• Rhizomatous
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Lawn Weed Management
• Crabgrass• Annual
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Lawn Weed Management
• Dallisgrass• Perennial
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Lawn Weed Management
• Goosegrass• Annual• Prostrate growth habit
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Lawn Weed Management
• Nutsedge• Perennial• Triangular stems• Purple and yellow
species
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Lawn Weed Management
• Curly Dock• Perennial
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Lawn Weed Management
• Dandelion• Carolina False is
winter annual or biennial
• Common and Cat’s Ear are perennials
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Pasture Weed Management
• Carolina Geranium• Annual
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Lawn Weed Management
• Henbit• Annual• Square stems
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Lawn Weed Management
• Plaintain• Perennial
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Weeds of Turfgrasses
Common Chickweed
▪Winter annual
J. N
eal
J. D
iTom
aso
▪Germinates fall and spring▪Prefers shady,
moist areas
Broadleaf Weeds
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Lawn Weed Management
• Red Sorrel• Perennial
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Pasture Weed Management
• Virginia Pepperweed• Annual
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Lawn Weed Management
• Wild Garlic• Perennial
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Lawn Weed Management
• Annual Bluegrass• Annual
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Weeds of Turfgrasses
▪Creeping perennial White clover
J. N
eal
▪Trifoliate leaves on long petioles
red clover
▪Red clover is related
Broadleaf Weeds
▪Reproduce by seeds and stolons
(Other creepingperennials reproduce
from rhizomes, stolons, tubers and
bulbs.)
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Weed Pests of Lawns
J. N
eal
J. N
e al
Woodsorrel
▪Seeds shoot up to 16’
▪Trifoliate leaves with heart-shaped leaflets
▪Prostrate, stoloniferous▪Perennial
Identifying Weeds
▪Hoe or hand pull
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Conditions for applying Pre-emergent herbicides
• Use BEFORE weeds germinate• For summer weeds such as, crabgrass, goosegrass &
foxtail– Apply early to mid Spring
• Winter annual weeds such as bluegrass, henbit, wild onions– Apply in September
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Conditions for Applying Post-emergence Herbicides
• Actively growing weeds• Daytime temperatures between 60 and 80 F• Adequate soil moisture• Ample leaf surface area ( Apply before mowing)
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Crabgrass Control
• Crabgrass is the most prevalent grassy weed • Annual which germinates April -Summer. Plants killed by
frost– Under normal conditions germination begins around
March 10 - April 1• Pre-emergence or Post-emergence control• Numerous products available. Most common
active ingredients are: benefin(Balan), pendimethalin (Halts), and prodiamine (Barricade)
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Insect Control
• Ants• Army/Cutworms• Bees/Wasps• White Grubs• Leafhoppers/Spittlebugs• Sod Webworms
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Insect Pests of Turfgrasses
Cutworms and armyworms
adult moth
eggs caterpillar
pupa
➢ Pests that Feed on Leaves and Stems
Complete Metamorphosis
caterpillar
(page 34)
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Insect Pests of Turfgrasses
Sod webworm➢ Pests that Feed on Leaves and Stems
eggssod webworm
pupaadultmoth
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Insect Pests of TurfgrassesIdentifying Insect Pests
➢ Pests that Discolor Leaves and Stems
chinch bugs (page 35)
Gradual Metamorphosiseggs
1st nymph
2nd nymph
3rd nymph4th nymph
5th nymph
adult bug
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Insect Pests of Turfgrasses
▪Pests that Feed on Roots– White grubs
Mole crickets
(page 36)
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Insect Pests of TurfgrassesIdentifying Insect Pests
➢ White Grubs that Feed on Roots
green June beetle
White Grubs are the larvae of beetles such as the
Japanese beetle
masked chaferOriental beetle
(page 36)
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Weeds of TurfgrassesWild Garlic
▪Bulbous perennial
R. U
va
J. Nea
l
▪Strong scent ▪Reproduces by aerial
and underground bulblets▪Emerges in the
winter and dies back in late spring or early summer
(page 57)
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Diseases of Plants
Terms to Know: Disorders and Diseases
Plant problems caused by pathogens (fungi, bacteria & viruses) which can spread from plant to plant.
Diseases --
Irregular plant development caused by unfavorable growing conditions. Non-infectious (does not spread from plant to plant).
Disorders --
(page 61)
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Plant DiseasesTo have a disease you need all four of these.
Environment
HostPathogen
Time
The “Disease Pyramid”
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Diseases of Turfgrasses
Brown patch ▪Most common
disease of fescue▪Cool-season grasses:
warm, humid weather▪Warm-season grasses:
cool, wet weather
Common Diseases (page 65)
▪Avoid high nitrogen▪Avoid excessive water▪Fungicides can help
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F H Baker
Diseases of Turfgrasses
Fairy Rings▪Several kinds of
mushrooms & puffballs
▪Hard to control▪Rings may brown out
in hot, dry weather
Common Diseases (page 67)
▪Remove stumps and roots before planting ▪Irrigation and proper
fertilization help
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Diseases of Turfgrasses
Helminthosporium Diseases
(Also called Melting Out, Leaf Spot, Net-blotch, Crown and Root Rot)
▪Wet or very humid weather▪Attacks all turf types▪Starts as leaf spot and goes
to crown and root rot
Common Diseases
(page 69)
▪Avoid high nitrogen fertilization
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Diseases of Turfgrasses
Pythium Blight (Also called Cottony Blight and Greasy Spot)
▪Hot and wet or very humid weather
▪Attacks all cool-season grasses
▪Can damage large areas overnight
Common Diseases
(page 70)
▪Provide good drainage▪Increase light penetration and air movement
(such as fans on greens)
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Conclusion
• Get clarification on location• Look at management strategy• Identify the problem• Look at alternative solutions
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Questions