MG 3-7-11 Horneck Controlling Crabgrass And Bermuda Grass In Your Lawn

3/9/2011Controlling crabgrass,Bermuda grass andnutsedge in your lawnByDonald A HorneckOSU Extension Service, HARECThree weeds Wewill work from the easiest to the mostdifficult Crabgrass Bermuda NutsedgeGrass herbicides for yourgarden/shrubs/flowersFirst - your flowers, ornamentals Grass Thecontrol not too difficultuse of glyphosate is difficult (round(round--up) GrassGrass--b-gone, Overthe top, Ornamec or Poast Controlspresentgrasses when a broadleaf isYour lawnYour Lawn Perennial grass of some typePerennial ryegrassKentucky BluegrassTall FescueFine fescueBentgrassOthers? Generallycool--season grassescool1

3/9/2011Your Lawn Perennialgrass of some type Just breaking dormancy, Maybe thinking of your first mowing Why the choiceWhat you boughtHigh traffic areaLots of shadeDrought tolerantSome facts Lawnsdo not last forever without someupkeep and regeneration! This means proper eed controlAeratingWeed controlCrabgrass and Bermuda Problemsis no better weed control than ah lth densehealthydturf!t f!in many lawns There Bothwarm season grasses Where they create their opportunityCrabgrass Easy! Itis an Annual means comes up from seed EVERY year Thisis its weak point and we can takeadvantage on this2

3/9/2011Crabgrass prepre--emergence herbicides Benefin - Balan benefin/trifluralin– Team Bensulide – Betasan corn gluten meal – Many dithiopyrdithiop – Dimension oxadiazon – Ronstar Pendimethalin - PrePre--M/Pendulum prodiamine – Barricade Siduron - Tupersan Pendimethalin What Impactsgermination Soil active herbicideCrabgrass post emergenceherbicidesRule of thumbthe forsthitia bloom in the spring it istime to apply your prepre-emergence herbicidefor crab grass controlis this? PrePre--emergence Whenapplication is usually enough in ourclimate ACCLAIM- should be applied whencrabgrass is in the 3 to 4 leaf stage ofdevelopment One Crabgrass Ratedepends on growth stagenot as common as people thinkBermuda grassThe BEASTCultural control Mowhigh – 2.52.5-3 inches Keeps seeds from germinating Decreaseheight in fall and bag HarvestsHt seeddhheadsd Fertilizeadequately Keep fertility low in the fall Fertilize in early winter Handweed Perennial Warmseason grass Aggressive Will Willcome up through amazing stuffcrawl over barriers Difficultto kill3

3/9/2011Bermuda Mostpeople that think they have crabgrassactually have Bermuda (in my experience) RUNNERS!!!!! Climb Cross over curbsBermuda Firstto brown up in the fall Lastto green up in the spring Notvery shade tolerantCultural control Goingdormant in the fall Allows for fall fertilization Allows for fall overover--seeding LastL ttot green iin theth springi Lets you get your act together to overover-seed andget another grass established Mowinghigh will keep light to a minimumand make your lawn grass more competitiveOver--seedingOver Seedinginto your grass Must keep moist Requires using something to cover Sand Peatmossbark mulch Compost Soil Fine Themore care used the higher thegermination 4

3/9/2011Chemical control Mustbe in combination with cultural control Turflon Dimension- expensiveBermuda Cultural Shade Mowing height OverOver--seeding Chemical several Combination Best opportunity for successNutsedge Extremelydifficult to control Glyphosate will not control Cultural control difficult except maintain healthylawn Present along lots of canal banks so if gettingirrigation water may be inoculating yourself. Likes over irrigation Common weed across the USA5

3/9/2011IdentificationNutsedge Yellow Coarse Threeways to attack your lawn Seeds NutsN t Rhizomes Triangularleaves Dig up and there are nutletsChemical control Homeownerscan buy prepre-emergentherbicides like Pennant (for turfgrass orornamental plants) or Basagran T/O,Daconate 6 for coolcool--season grasses dge.htmlHalosulfuron Controlsnutsedges Manage Sedgehammer Permit Legal to apply to a lawn (except permit) Difficulty- not easily available inhomeowner formulations6

3/9/2011SedgeHammer HerbicideThe Gown Company has acquired the rights to Manage Herbicide and is sellingthe product under the brand name "SedgeHammer". Same great product, sameactive ingredients with the same great results. Only the name has changed.SedgeHammergherbicide controls both yellowyand ppurplep nutsedgeg in cool seasonand warm season turfgrasses. It can be used in both turf and landscaped areas,including those with established woody ornamentals.SedgeHammer: Same as Manage.SedgeHammer works best when mixed with a professional surfactant,spreader sticker.Not available in CA, NY, NJ, CT, VT, MA, AKEach pack is 15.50, plus S&H.Order SedgeHammer weed killerPest .com/sedgehammer.htmYellow Nutsedge Bestcure Stay vigilant Maintain healthy lawn Irrigate correctly (likes wet) Onceinfested difficult to controlSummary Enjoyyour yardKOHU with questions on Fridaymornings (Lawn and Garden show) KeepKtheth battleb ttl realisticli ti Call Some weeds OK Don’t always need the chemical arsenal Whenin doubt – “sell the house”7

3/9/2011 4 Bermuda Most people that think they have crabgrass actually have Bermuda (in my experience) RUNNERS!!!!! Climb Cross over curbs Bermuda First to brown up in the fall LasttogreenupinthespringLast to green up in the spring Not very shade tolerant Cultural control Going dormant in the fall Allows for fall fertilization