Summer Weeds of Piedmont Park: Identification and Selecting Control Options

Transcription

1 Summer Weeds of Piedmont Park: Identification and Selecting Control Options Patrick McCullough, Ph.D. Extension Specialist, University of Georgia North Georgia Turf Field Day June 1, 21 Facts About Piedmont Park Land was purchased by Benjamin Walker in the 183s from a man who had won it in the land lottery Walker farmed the land until 1887, when he sold it to the Gentlemen's Driving Club, known today as the Piedmont Driving Club Land was then used for horse racing and as an exposition site 1895 Facts About Piedmont Park World s Fair (Cotton and International Exposition) 1895 President Grover Cleveland presided over opening Sept. to Dec for 1 days Constructed for the Expo: Atlanta Botanical Gardens and Lake Clara Meer

2 Pictures were taken Friday June 11, 21 Many of the weeds here are what you are facing now throughout the state Turfgrasses in Piedmont Park: Bermudagrass Tall Fescue

3 Bahiagrass Dallisgrass MSMA Update: See

4

5 Common Name Knowtweed Control Trade Names 2 to 3 way BLW Mixes Trimecs,, Weed B Gone atrazine/simazine bromoxynil fluroxypyr + 2,4-D D + dicamba metribuzin metsulfuron sulfentrazone (or combo products) triclopyr (or mixtures) various Buctril Escalade Sencor Blade, Manor, Spice Dismiss, Q4, Surge Turflon,, others

6 Dichondra Control Common Name 2 to 3 way BLW Mixes atrazine/simazine flazasulfuron metsulfuron quinclorac (or combo products) sulfentrazone (or combo products) triclopyr (or mixtures) trifloxysulfuron 2 to 3 way BLW Mixes Trimecs Trade Names Trimecs,, Weed B Gone various Katana Blade, Manor, Spice Drive, One-Time Dismiss, Q4, Surge Turflon,, others Monument

7

8 Bermudagrass Control in St. Augustinegrass 2 Weeks After Second Treatment Prograss + atrazine (2x) Untreated Bermudagrass Control in St. Augustinegrass 2 Weeks After Second Treatment Facts About Piedmont Park April 16, 1898, the first baseball game between Georgia and Georgia Tech was played. From 192 until 194, the Atlanta Crackers, the city's original professional baseball team played at Piedmont Park before moving to a stadium on Ponce de Leon Avenue

9 Common Name 2 to 3 way BLW Mixes atrazine/simazine flazasulfuron metsulfuron rimsulfuron sulfentrazone (or combo products) trifloxysulfuron Spurge Control 2 to 3 way BLW Mixes Trimecs Trade Names Trimecs,, Weed B Gone various Katana Blade, Manor, Spice TranXit Dismiss, Q4, Surge Monument

10 Mowing Height Effect on Smooth Crabgrass Incidence in Tall Fescue Crabgrass Cover (%) " 2" 3" 4" Mowing Height Source: Hoyle et al. 28 Crabgrass Control

11 Goosegrass Control Lespedeza Repeat applications Dicamba Metsulfuron Triclopyr Triclopyr + clopyralid

12

13

14 Specific Recommendations Specific Recommendations for Weed Control in Piedmont Park Crabgrass Bermudagrass: Drive XLR8 (1.5 SL) at 64 fl oz/acre Tall Fescue: Drive or Acclaim Extra at 15 fl oz/acre Goosegrass Bermudagrass: Revolver at 26 fl oz/acre applied 2x Tall Fescue: Acclaim at 15 to 2 fl oz/acre 1x in Specific Recommendations for Weed Control in Piedmont Park Bermudagrass Control in Tall Fescue Acclaim + Turflon Ester at 2 fl oz + 32 fl oz/acre, respectively. Three apps at monthly intervals. Fusilade + Turflon Ester at 6 fl oz + 32 fl oz/acre, respectively. Three apps at monthly intervals. Specific Recommendations for Weed Control in Piedmont Park Yellow Nutsedge (in bermudagrass) SedgeHammer at 1.3 oz/acre + NIS Dismiss at 12 fl oz/acre Other herbicides: Monument, Katana Lespedeza Repeat applications of dicamba (4L) at 1 pint/acre +/ metsulfuron (6DF) at.5 oz/acre Specific Recommendations for Weed Control in Piedmont Park Dallisgrass MSMA at 4 lb ai/acre followed by two applications of Revolver at 26 fl oz/acre Knotgrass MSMA at 4 lb ai/acre followed by two applications of Revolver at 26 fl oz/acre Nonselective control (Roundup at 8 fl oz/acre 2x) Specific Recommendations for Weed Control in Piedmont Park Broadleaf Weeds (Clover, Spurge, Knotweed) 2 to 3-way 3 BLW mixtures, One-Time, Trimec, Escalade, Celsius Metsulfuron Bahiagrass Control in Bermudagrass Metsulfuron (Blade, Manor, or Spice) at 1 oz/acre + NIS applied twice MSMA at 4 lb ai/acre followed by metsulfuron

15 Facts About Piedmont Park February 2, 1892 Georiga played Auburn in football for the first time in the park. UGA lost 1-. New Herbicides Concerts at Piedmont Park: Paul McCartney, Dave Matthews, Allman Brothers, and many more Celsius Herbicide Celsius 68WDG, (Bayer) Dicamba 57.4% Thiencarbazone-methyl 8.7% Iodosulfuron 1.9% Turfgrass Uses: : Warm-season turfgrasses Weeds Controlled: Broadleaf and grassy weeds. Release: Spring 21 Turfgrass Species Celsius Rate (oz prod./acre) Bermudagrass 2.5 to 7.4 Buffalograss 2.5 to 7.4 Centipedegrass 2.5 to 7.4 St. Augustinegrass 2.5 to 7.4 Zoysiagrass 2.5 to 7.4 Residential Lawns Commercial Lawns Golf Courses Sports Fields Celsius Campsites Parks Roadsides Cemeteries School Grounds Problem Weeds Controlled with Celsius Carpetgrass Va. Buttonweed Bull Paspalum Foxtail spp. Lespedeza Spurge Doveweed

16 Celsius (68 WG) at 3.7 oz/acre (2x) 1 WAIT Dallisgrass Control 6 WAIT Control (%) LSD = 12 4 oz/a (2x) 5.3 oz/a (1x) MSMA fb Celsius Revolver (2x) Control (%) Dallisgrass Control 12 WAIT LSD = 25 4 oz/a (2x) 5.3 oz/a (1x) MSMA fb Celsius Revolver (2x) Celsius Promising Uses with this Product St. Augustinegrass Grassy weeds: : barnyardgrass, foxtail, cool-season grasses, large crabgrass Carpetgrass control Lawns with mixed species (St. Augustine/centipede), (zoysia/bermudagrass) Celsius Advantages: Exceptional warm-season turfgrass tolerance, Lawn care operators use one product, Control of problem weeds: : Carpetgrass, Va. buttonweed, bull paspalum, others. Disadvantages: Tall fescue sensitivity, Two new active ingred., we don t t know much about, Two ALS inhibitors in the mix, slow activity, Pushed to market very quickly, still learning about it. Flazasulfuron Trade name: Katana (25 DF) Acetolactate synthase (ALS) inhibitor Sulfonylurea family Requires a non-ionic surfactant (.25% v/v), ammonium sulfate increases activity Available in spring 21 Use in bermudagrass and zoysiagrass Controls grasses, sedges, and broadleaf weeds

17 Flazasulfuron Katana (flazasulfuron) Weeds Controlled by Flazasulfuron Broadleaf Weeds Grassy Weeds Southwest bedstraw Field madder Lawn burweed Common chickweed White clover Large hop clover Dandelion Annual Bluegrass Annual Ryegrass Crabgrass spp. Nutsedge spp. Perennial Ryegrass Roughstalk bluegrass Tall Fescue Weeds Controlled by Flazasulfuron Broadleaf Weeds Grassy Weeds Southwest bedstraw Field madder Lawn burweed Common chickweed White clover Large hop clover Dandelion Annual Bluegrass Annual Ryegrass Crabgrass spp. Nutsedge spp. Perennial Ryegrass Roughstalk bluegrass Tall Fescue Perennial Ryegrass Control (6 WAT in 29, UGA Griffin) Perennial Ryegrass Control (6 WAT in 29, UGA Griffin) No Urea Urea 1.5 lb/1 sq ft No Urea Urea 1.5 lb/1 sq ft Control (%) Flazasulfuron 25 DF Rate (oz of product/acre) Control (%) Flazasulfuron 25 DF Rate (oz of product/acre) Poa annua Control (6 WAT in 29, UGA Griffin) Poa annua Control (6 WAT in 29, UGA Griffin) No Urea Urea 1.5 lb/1 sq ft No Urea Urea 1.5 lb/1 sq ft Control (%) Flazasulfuron 25 DF Rate (oz of product/acre) Control (%) Flazasulfuron 25 DF Rate (oz of product/acre)

18 Flazasulfuron at.5 oz/acre + NIS + Urea at 1.5 lbs/1 sq ft ( + 3 WAT) (5 WAT, 29) Katana (flazasulfuron) Purple Nutsedge Repeat applications are needed Two applications of.5 oz/acre similar to halosulfuron. Kyllinga Season long control with two applications Similar to halosulfuron Dimethenamid Tower Labeled Turfgrasses Tower Herbicide,, 6. lb./gal. BASF product, Mode of action: Substituted amide Similar activity to Pennant Preemergence Use Labeled in nursery and landscape ornamentals Golf turf 29 Other turf sites 21 Cool-Season Grasses Bentgrass sp. Bluegrass, Annual Bluegrass, Kentucky Fescue, Fine Fescue, Tall Ryegrass, Perennial Warm-Season Grasses Bahiagrass Bermudagrass Buffalograss Centipedegrass St. Augustinegrass Seashore Paspalum Zoysiagrass Dimethenamid (Tower) Amicarbazone Rates 21 to 32 fl oz/acre Total per year: 64 fl oz/acre Controls Annual Grasses goosegrass, annual bluegrass Sedges: : Yellow nutsedge, annual sedges Annual broadleaf weeds: : spurges, carpetweed, Fl. pusley. Common purslane Tank-mix with other DNAs (pendimethalin) to increase crabgrass control. Trade Name: : Not disclosed Developed by Arysta LifeScience Photosystem II inhibitor Primary use: : Selective Poa annua control Must be used in late winter or early spring only NOT FOR USE in fall or warm weather on cool-season turf Some soil residual activity and broadleaf weed control Potential introduction to turf:

19 Annual Bluegrass Control in Bermudagrass UGA Griffin, 21 Annual Bluegrass Control in Bermudagrass UGA Griffin, 21 Amicarbazone 7DF 1 oz/acre Ami 1. oz/a Ami 7.5 oz/a Ami 5. oz/a Appl. Date: March 16, 21 Photo: April 14, 21 Photo: April 14, 21 (1 MAT) Fall Applications of Amicarbazone on Creeping Bentgrass When is it safe to use amicarbazone? Source: Yelverton, NC State Summer Applications of Amicarbazone on Creeping Bentgrass Source: Yelverton, NC State Rutgers Univ.

20 Tall Fescue Establishment 4 WAS Treatments Applied Day of Seeding (UGA 21) How soon can we reseed in to amicarbazone treated areas? Turf Cover (% of Untreated) LSD = Velocity Amicarbazone Rate 7 WG (oz of product/acre) 1.67 oz/acre Perennial Ryegrass Establishment 4 WAS Turf Cover (% of Untreated) Treatments Applied Day of Seeding (UGA 21) LSD = Velocity Amicarbazone Rate 7 WG (oz of product/acre) 1.67 oz/acre Amicarbazone Advantages: Use early spring in cool temperatures Safety to cool-season grasses in spring Reseed intervals may be quicker than Velocity Use during bermudagrass greenup (vs. glyphosate) Disadvantages: Do not use in summer or fall in cool-season turf Mode of action is similar to atrazine and simazine Indaziflam Source: G. Henry, Texas Tech Trade Name: : Specticle Developed by Bayer Chemical class: alkylazines Primary use: : Preemergence Herbicide, some POST activity Annual bluegrass control Crabgrass and goosegrass Other weeds Potential introduction to turf: late 21 or 211.

21 Source: G. Henry, Texas Tech Source: G. Henry, Texas Tech Smooth Crabgrass Control 15 WAT (6/1/1) Applications Made on 2/19/1 Smooth Crabgrass Control 4 WAT (5/4/1) Late Spring Applications Made on 4/6/1 Crabgrass Control (%) Crabgrass Control (%) Specticle 2WP Rate (g a.i./ha) Specticle 2WP Rate (g a.i./ha) Smooth Crabgrass Control 8 WAT (6/1/1) Late Spring Applications Made on 4/6/1 Crabgrass Control (%) Specticle 2WP Rate (g a.i./ha) Indaziflam Trade Name: : Specticle Developed by Bayer Chemical class: alkylazines Preemergence Poa annua control 9 to 1% control Texas Tech Research on Poa annua control, treatments from.3 kg to.6 kg a.i./ha Low rates: : 82% POST control by 1 WAIT High rates: : 94 to 1% POST control by 1 WAIT

22 Indaziflam (Specticle) Advantages: Greater flexibility with application timing Long residual control Excellent weed control Disadvantages: Turfgrass safety, concerns over rooting inhibition Lateral movement Aminocyclopyrachlor Trade name: Imprelis Classification: Pyrimidine caboxylic acid Mode of action: : Synthetic auxin Use: : Postemergence broadleaf weed control Dupont product that will be released in fall 21 Turfgrasses: Tall fescue, ryegrass, and warm- season grasses (bermuda has intermediate tolerance) Aminocyclopyrachlor White Clover Control 5 Days After Treatment June 21 UGA Griffin Roadside VM Products: Perspective aminocyclopyrachlor + chlorsulfuron Plainview aminocyclopyrachlor + chlorsulfuron + sulfometuron Streamline aminocyclopyrachlor + metsulfuron Name??? aminocyclopyrachlor + rimsulfuron Imprelis SL at 4.5 fl oz/acre Untreated Catsear Dandelion 5 Days After Treatment June 21 UGA Griffin Plainview (aminocylcopyrachlor (5DF) at 3.8 oz/acre + chlorsulfuron (75 DF) at.6 oz/acre)

23 New Trade Names Spice metsulfuron (Regal) Departure glyphosate (Syngenta) Starfighter oxadiazon (Phoenix) Q4 Plus quinclorac + sulfentrazone + 2,4-D + dicamba (PBI Gordon)