overseeding athletic fields - nc sports turf managers ... · pdf fileoutline for discussion...
TRANSCRIPT
Outline for DiscussionVarieties, procedures, transition
• Picking the grass
• Preparation
• Do’s and Don’ts
• Planting
• Post planting
• During the season
• End of growing season
• Thinking about the next year
2006 Perennial Ryegrass Recommended
List based on 2004 NTEP and NCSU
Regional Trails
• Accent II
• Allstar 3
• Apple GL
• Brightsar SLT
• Caddieshack II
• Charismatic II
• Citation Fore
• Dart
• DCM
• Derby Extreme
• Fiesta 4
• Fiji
• Goalkeeper II
• Grand Slam 2
• Homerun
• Inspire
• Keystone II
• Line Drive GLS
• Manhattan 5 GLR
• Monterey 3
• Nexus
• Palmer III
• Palmer IV
• Panther GLS
• Paragon GLR
• Pentium
• Phenom
• Pianist
• Pinnacle II
• Pizzazz
• Premier
• Primary
• Quilksilver
• Repell GLS
• Revenge GLX
• Secretariat II
• Silver Dollar
• Transformer
• Top Gun II
• Zoom
Can spray Primo MAXX to slow down
Bermudagrass. Apply before vertical
mowing and 1 - 5 days before seeding.
Rate: 0.5 oz/1000 square feet
Vertical mow 1 to 2 days before overseeding to remove thatch and
open the turfgrass canopy to ensure good seed-to-soil contact.
When to Seed?
• Daytime temperatures are consistently into
the 70’s for 4 to 5 consecutive days.
• So, about mid-September to mid-October
for most of NC.
Overseeding Rates?
• Perennial ryegrass at a rate of 6 to 20 lbs per 1000
square feet (260 to 870 lbs per acre), depending on
desired appearance and/or budget constraints.
• Around 10-12 pounds a good rate to target if you have
no experience.
• Split rate and seed in two different directions.
• Afterwards go over area with a drag mat to work seed
down into canopy.
Mowing• Can begin as soon as seed does not come up
when you pull on leaf blade.
• Regular schedule (weekly in winter, twice weekly in spring)
• Height: around ¾ inch height up to about 2 inches. Baseball infields may be mowed a little lower.
• Reel mower preferred
• Always keep blades sharp!
Fertilization
• Do not fertilize bermudagrass heavily just prior to or during the overseeding process.
• Concentrate most of N & K and soil sample for other nutrients. Apply K at a rate and schedule similar to N.
• Gear nitrogen application schedule to grass, field use, and environmental conditions.
• May need to force growth and recovery in high traffic areas with additional nitrogen.
• Do not ignore soil pH in fertility program.
Fertilization Rates
• During overseed growth, a normal rate
may be ¼ to ½ pound per 1000 square
feet every two to three weeks.
Ammonium Sulfate (21% N) Equivalents:
– 50 to 100 pounds per acre
– 2 to 4 bags per football or soccer field
– 2.5 to 5 bags per baseball field
Irrigation
• With “automatic systems”, the controllers should be
programmed to operate at set times.
• Calibrate your systems so that you can relate run times
to precipitation rates.
• The clocks and systems should be monitored weekly
and any adjustments will be made accordingly.
• The turf/soil water status should be monitored daily.
• Irrigation schedules should be adjusted as necessary to
accommodate insufficient or excess rainfall.
Diseases
• Temperatures >65 F
• Excessive soil and leaf moisture (rain, dew, or consecutive foggy days)
• Fungicide coated seed can help
• After plants established cut back on watering so soil is not soggy.
• Fungicides (Aliette, Banol, Fore/Dithane, Insignia, Heritage, Koban, Terrazole, Subdue, etc) can help prevent outbreaks.
Winter Management
• Proper watering
• Fertilization practices
• Traffic control
• Routine mowing
• Proper disease management
Some think it’s holding on
that makes one strong;
sometimes it’s letting go.----Sylvia Robinson
Spring Transition
Spring Transition Influences
• Temperature (50-60s bermudagrass begins to
grow)
• Mowing height (get it down to ½ inch, slowly)
• Fertilization practices (low rates until
bermudagrass shows up)
• Cultivation (spike or slice)
• Vertical mowing (light and frequent)
• Soil moisture (don’t cut the water off)
• Herbicides (the other talk!)
Chemical Transtion Products
• Kerb (Pronamide) – Dow AgroSciences
• Manor [or Blade] (metsulfuron) - Riverdale
• TranXit GTA (rimsulfuron) – Griffin LLC
• Revolver (foramsulfuron) - Bayer
• Monument 75WG (trifloxysulfuron) – Syngenta
• Corsair (chlorsulfuron) – [label for fields?] – Riverdale
• Certainty 75 DG (sulfosulfuron) - Monsanto
[foliar applied, foliar (and some root) absorption]
Basics that a turf plant needs to
stay alive and grow
• Light to drive photosynthesis (shade, clouds, covers, overseed competition)
• Water uptake (irrigation distribution or application, lack of rainfall, compacted soils)
• Oxygen for respiration (saturated soils, compacted soils)
• Carbon dioxide to assimilate carbohydrates (not an issue)
• Absorption of mineral nutrients (lack of roots, lack of nutrients/availability, antagonistic nutrient or pH situations, lack of light, extremely dry soil)
• Suitable temperature (too cold or too hot)
• Space (generally not an issue for overseed)