Wilson County Landscapers January 30, 2004
NCSU Turf Website www.turffiles.ncsu.edu
Weed Control With Preemergence Herbicides Herbicides do not prevent weeds from germinating, they kill weeds as they grow through the herbicide treated zone.
Weed Control With Preemergence Herbicides Large gaps in herbicide barriers result in weed escapes.
PRE Smooth Crabgrass Control With Barricade Treatment Lbs AI/A % Control Nontreated -- 0 Barricade 65 WG 0.75 98 Barricade 0.5 G 0.75 81 Barricade 0.29 G 0.75 91 LSD 0.05 9.3 Experimental Barricade Formulations, Hidden Valley GC, 1996. Applied March 4, evaluated Sept. 26
Size of Particle is Critical
Uniformity of Particle Size
Coverage with Granular vs Spray
Particles Have A Sphere of Influence
Particles Have A Sphere of Influence
Major Preemergence Crabgrass/Goosegrass Herbicides Dinitroanalines - DNAs: prodiamine (Barricade) oryzalin (Surflan) pendimethalin (Pendulum, Pre-M, etc.) Team Pro (trifluralin + benefin) XL (oryzalin + benefin)
Major Preemergence Crabgrass/Goosegrass Herbicides Oxadiazole oxadiazon (Ronstar) Pyridines dithiopyr (Dimension)
DNA herbicides can injure stoloniferous turf species that are not well established
Turfgrasses may have difficulty rooting where DNA herbicides have been used
Ronstar does not inhibit rooting of stoloniferous turf species
% Control PRE Control of Crabgrass 100 80 60 50 96 90 86 85 Pendimeth DG 3 lb ai Pendimeth G 3 lb ai Barricade WG.75 lb ai Ronstar WP 3 lb ai 40 Ronstar G 3 lb ai 20 0 Ratings taken Sept 19. Rates are per acre applied 3-1. Thorndale CC, 2002
% Control PRE Control of Crabgrass 100 80 75 76 86 91 Surflan L 3 lb ai Dimension Ultra.5 lb ai Regalstar 200 lb 60 40 54 Regalstar II 200 lb Team Pro G 3 lb ai 20 0 Ratings taken Sept 19. Rates are per acre applied 3-1. Thorndale CC, 2002
% Control PRE Control of Crabgrass 100 80 91 85 100 83 Team Pro 2 lb ai + Surflan 1.5 lb ai Team Pro 2+2 lb ai 60 Pendimeth G 1.5+1.5 lb ai 40 Pendimeth 1.5+1.5 lb ai 20 0 Ratings taken Sept 19. Rates are per acre applied 3-1. Thorndale CC, 2002
New & Experimental Herbicides foramsulfuron (Revolver) Bayer rimsulfuron (Tranxit) Griffin sulfosulfuron Monsanto Trifloxysulfuron (Monument) Syngenta Flazasulfuron ISK Biotech Velocity Valent Carentrazone (Quicksilver) - FMC
New Herbicide foramsulfuron Bayer Trade Name - Revolver
Foramsulfuron - Revolver Weeds Controlled: Perennial ryegrass, Poa annua, goosegrass, Maybe: Dallisgrass????
Dallisgrass (Paspalum dilatatum)
Foramsulfuron - Revolver Dallisgrass: Apply MSMA 2 lbs ai/a Apply Revolver at the spot spray rate 2 wks after MSMA Apply MSMA 2 lbs ai/a when dallisgrass starts to regrow
New Herbicide Carfentrazone - FMC Trade Name - Quicksilver
Trifloxysulfuron - Monument Weeds Controlled: Yellow nutsedge, purple nutsedge, green kyllinga, Poa annua, Perennial ryegrass, dollarweed, Virginia buttonweed, Lawn burweed, wild violet
Spurweed (Soliva pterosperma)
Monument Active ingridient: trifloxysulfuron Sulfonylurea developed by Syngenta 75WG formulation Caution signal word
Monument Currently labelled for bermudagrass, zoysiagrass, buffalograss, and St. Augustinegrass grown on golf courses, sod farms, athlethic fields, and other non-crop areas including airports and cemetaries Applications include: POST control of many perennial and annual grasses, sedges, and broadleaf weeds
Wild Violet (Viola spp.)
Field Pansy (Viola rafinesquii)
Monument Applications include: POST control of selected annual grasses Transition in spring from overseeded perennial ryegrass to bermudagrass
Turfgrass Tolerance to Trifloxysulfuron Common bermudagrass Tifway bermudagrass El Toro & Meyer zoysiagrass Highly Tolerant Common centipedegrass Susceptible
And very phytotoxic to perennial ryegrass Metsulfuron is highly water soluble
Sedge Control With New Herbicides Sulfonylurea herbicides included: Flazasulfuron (ISK) Manage Monument Sulfosulfuron (Monsanto)
Research Trials False green kyllinga (Kyllinga gracillima) Purple nutsedge (Cyperus rotundus) Yellow nutsedge (Cyperus esculentus)
Purple and Yellow Nutsedge and False Green Kyllinga Rapidly spreading perennial weed species Commonly found in moist areas
Purple Nutsedge (Cyperus rotundus)
Yellow Nutsedge (Cyperus esculentus)
% Control Purple Nutsedge (Cyperus rotundus) Control 100 96a 80 80b 86ab 86ab 84ab Monument.35 oz 60 40 20 65c Monument.47 oz Monument.59 oz Monument.35 oz + Bueno 6 1.33pt Manage 1.27 oz 0 2 WAIT Image 2.67 pt Rates are per acre. Trial initiated 6-21. All treatments received sequential applied 8-2.
% Control Purple Nutsedge (Cyperus rotundus) Control 100 80 60 40 20 0 78bc 85ab 94a 63d 14 WAIT Monument.35 oz Monument.47 oz Monument.59 oz Monument.35 oz + Bueno 6 1.33pt Manage 1.27 oz Image 2.67 pt Rates are per acre. Trial initiated 6-21. All treatments received sequential applied 8-2. 69cd 63d
Purple Nutsedge (Cyperus rotundus)
% Control Purple Nutsedge (Cyperus rotundus) Control with Single Application 100 80 91 a 60 40 20 44 b Monument.56 oz Manage 1.33 oz 0 12 WAT Rates are per acre. All trts included 0.25% v/v NIS. Trial initiated 6-21.
Green Kyllinga (Kyllinga brevifolia) & False Green Kyllinga (K. gracillima)
% Control False Green Kyllinga (Kyllinga gracillima) Control 100 80 97 a 87 ab Monument.47 oz 60 40 20 0 56 b 18 WAT Manage 1.33 oz Image + MSMA.5 fb 2 lb ai
Poa annua Control Revolver Bayer Tranxit Griffin sulfosulfuron Monsanto Monument Syngenta Flazasulfuron ISK Biotech
% Control Poa annua Control in Non- Overseeded Bermudagrass 100 97 98 98 89 80 60 40 38 54 56 69 for 18 fl oz for 36 fl oz for 54 fl oz Roundup Pro 1 qt 20 0 0 0 0 0 3 WAT 6 WAT 10 WAT Rates are product per acre applied 12-18-01. Poa annua was 0-2 tiller at application. Quail Ridge, 2001
% Control Poa annua Control in Non- Overseeded Bermudagrass 100 80 60 40 53 51 59 84 99 98 100 100 for 18 fl oz for 36 fl oz for 54 fl oz Roundup Pro 1 qt 20 0 0 0 0 10 2 WAT 4 WAT 8 WAT Rates are product per acre applied 3-14-01. Poa annua was 3-8 tiller w/ seedheads at application. Quail Ridge, 2001
Nontreated
Foramsulfuron 18 fl oz/a
Foramsulfuron 36 fl oz/a
Foramsulfuron 54 fl oz/a
Roundup Pro 1 qt/a
% Control Perennial Ryegrass Control for Transition 100 86 89 100 100 85 80 60 40 20 49 58 55 50 40 23 10 9 60 45 for 9 fl oz for 18 fl oz for 28 fl oz Manor.5 oz Kerb.5 lb ai 0 2 WAT 4 WAT 8 WAT Rates are per acre applied 5-7-01. Prestonwood CC, 2001
Foramsulfuron 9 fl oz/a Foramsulfuron 18 fl oz/a 3 WAT
Foramsulfuron 28 fl oz/a Manor.5 oz/a 3 WAT
Kerb.5 lb ai/a Nontreated 3 WAT
Perennial Ryegrass (Lolium perenne)
utc Revolver 0.4 oz
The best way to control clumpy ryegrass is to prevent it from establishing in nonoverseeded areas
Barricade applied at 0.5 lbs ai/a the day before overseeding.