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Barnyardgrass

Description

Barnyardgrass is an upright summer annual weed of turfgrass. It is found in moist, disturbed sites, marshes, and wet turf areas. Barnyardgrass can most easily be distinguished from other grasses by its seedhead, and the fact that it has no ligule.

Cultural Control

These grasses occur infrequently in North Carolina in highly maintained turf but can be common in utility turf, such as along roadsides. Maintaining a dense, healthy turf year round by proper mowing and fertilization helps prevent encroachment and weed establishment.

Chemical Control

Herbicide and Formulation
Amount of Formulation per 1,000 sq ft
Amount of Formulation per Acre
Pounds Active Ingredient per Acre

Postemergence Control

Herbicide and Formulation

quinclorac, MOA (27 + 4) (Drive 75 DF, Quinclorac 75 DF or Quinclorac SPC 75 DF) 75 DF (Drive XLR8) 1.5 SL

Amount of Formulation per 1,000 sq ft

0.367 oz 1.45 fl oz

Amount of Formulation per Acre

1 lb 2 qt

Pounds Active Ingredient per Acre

0.75 0.75

Precaution and Remarks

For use in residential and nonresidential turf that is established or newly seeded, overseeded, or sprigged. Refer to label for specific varieties. Apply to common and hybrid bermudagrass, Kentucky bluegrass, annual bluegrass, buffalograss, tall fescue, annual and perennial ryegrass, creeping bentgrass, and zoysiagrass. Can also be applied to fine fescue but must be in a blend. Some discoloration of hybrid bermudagrass, creeping bentgrass or fine fescue may occur. Do not apply to bahiagrass, centipedegrass, St. Augustinegrass, or dichondra. Do not use on golf course greens or collars. The addition of methylated seed oil (1.5 pint per acre or 0.55 ounces per 1,000 sq ft) or a crop oil concentrate (2 pint per acre or 0.73 ounces per 1,000 square feet) is required for control. Application to weeds under stress will result in poor control. Irrigation 24 hours prior to application is recommended if drought conditions exist. Some ornamental plants are sensitive to Drive. See label for further precautions.

Postemergence Control

Herbicide and Formulation

quinclorac + sulfentrazone + 2,4-D amine + dicamba, MOA (27 + 4) + 14 + 4 + 4 (Q4) 1.54 L

Amount of Formulation per 1,000 sq ft

2.57 to 2.94 fl oz

Amount of Formulation per Acre

7 to 8 pt

Pounds Active Ingredient per Acre

1.35 to 1.54

Precaution and Remarks

For use in fully dormant bermudagrass and zoysiagrass as well as cool-season turf including annual bluegrass and ryegrass, perennial bluegrass and ryegrass, and fescue species. Do not apply to bahiagrass, bentgrass (creeping, Seaside, Colonial), centipedegrass, St. Augustinegrass, carpetgrass, and golf course greens, tees, and collars. May be applied to home lawns. Apply to seedling grasses after second or third mowing, or 28 days after emergence. Wait 3 to 4 weeks after sodding, sprigging, or plugging operations to apply. Wait 4 weeks after application to seed.

Postemergence Control

Herbicide and Formulation

(Q4 Plus) 1.79 L

Amount of Formulation per 1,000 sq ft

1.8 to 3 fl oz

Amount of Formulation per Acre

5 to 8 pt

Pounds Active Ingredient per Acre

1.12 to 1.79

Precaution and Remarks

Contains 0.25 lb ai per gal more quinclorac than Q4. Same statements as above except can be applied to actively growing bermudagrass after spring greenup but use only 5 to 7 pt per acre.

Postemergence Control

Herbicide and Formulation

quinclorac + 2,4-D amine + dicamba, MOA (27 + 4) + 4 + 4 (Quincept) 1.875 SL

Amount of Formulation per 1,000 sq ft

2.57 to 2.94 fl oz

Amount of Formulation per Acre

7 to 8 pt

Pounds Active Ingredient per Acre

1.64 to 1.875

Precaution and Remarks

For use in residential and nonresidential cool season turf, including athletic fields, golf courses, and sod farms. Do not use on centipedegrass, St. Augustinegrass, bahiagrass, zoysiagrass, bermudagrass, bentgrass, or dichondra. Can apply to tolerant turfgrass seedlings after third mowing, and to newly sodded, sprigged, or plugged grasses 3 to 4 weeks after operations.

Postemergence Control

Herbicide and Formulation

quinclorac + mecoprop + dicamba, MOA (27 + 4) + 4 + 4 (Onetime) 2.45 SL

Amount of Formulation per 1,000 sq ft

0.5 to 1.45 fl oz

Amount of Formulation per Acre

0.68 to 2 qt

Pounds Active Ingredient per Acre

0.4165 to 1.225

Precaution and Remarks

For use in warm- and cool-season residential and non-residential turf, including but not limited to commercial property, parks, roadsides, schools, athletic fields, cemeteries, and golf courses. May be applied to species of bermudagrass, bluegrass, fescue, and ryegrass as well as creeping bentgrass, seashore paspalum, and zoysiagrass. Use with methylated seed oil at 1.5 pint per acre. Allow 28 days of seedling or sprig growth before application. If treating first, allow 28 days before seeding or sprigging. Do not apply to golf course collars or greens or to turf grown for sod. Use low rate in 2 split applications when treating creeping bentgrass.

Postemergence Control

Herbicide and Formulation

carfentrazone + quinclorac, MOA 14 + (27 + 4) (SquareOne) 75 WG

Amount of Formulation per 1,000 sq ft

0.184 to 0.413 oz

Amount of Formulation per Acre

8 to 18 oz

Pounds Active Ingredient per Acre

0.35 to 0.79

Precaution and Remarks

Can use up to 12 ounces per acre 7 days after emergence from seed or sod installment on bluegrass and fescue species and perennial ryegrass. 18 ounces per acre can be used 7 days after seed, sod or sprig operations on bermudagrass species, centipedegrass and seashore paspalum. Wait 14 days after emergence for zoysiagrass. May apply to residential, commercial, and institutional lawns, athletic fields, sod farms, and golf course fairways and roughs. Adjuvants not required but may help on mature weeds.

Postemergence Control

Herbicide and Formulation

sulfentrazone + quinclorac, MOA 14 + (27 + 4) (Solitare) 75 WG

Amount of Formulation per 1,000 sq ft

0.367 to 0.735 oz

Amount of Formulation per Acre

1 to 2 lb

Pounds Active Ingredient per Acre

0.75 to 1.5

Precaution and Remarks

Use up to 21 ounces per acre on well-established tall fescue, Kentucky bluegrass and perennial ryegrass; up to 32 ounces per acre on well-established bermudagrass, centipedegrass, zoysiagrass and seashore paspalum. May be applied to residential, commercial, and institutional lawns, athletic fields, sod farms, and golf course fairways and roughs. After treatment, wait at least 1 month before reseeding, overseeding (use slit seeder for best results), or sprigging. Wait at least 3 months for sod establishment and do not spray within 3 months of harvest. Controls goosegrass in the 1 to 4 leaf stage. Yellow nutsedge and kyllinga species are also controlled. Do not apply with a spray adjuvant.

Presentations

Publications

Species Data

Seedhead/Flower

panicle; seedhead often purple, spikelets end in a bristle

flowerspike
flowerspike
flowerspike
seedhead
seedhead
seedhead
seedhead3
seedhead3
seedhead3
Vernation type

leaves rolled in the bud

crown3
crown3
crown3
dscn1225 barnyardgrass
dscn1225 barnyardgrass
dscn1225 barnyardgrass
leafblade
leafblade
leafblade
midrib
midrib
midrib
vernation
vernation
vernation
Ligule Type

absent

ligule
ligule
ligule
Growth Season/Life Cycle

summer annual weed

Auricle type

absent

ligule
ligule
ligule
sheath
sheath
sheath
vernation4
vernation4
vernation4
Leaf blade tip shape

sharp-pointed; edges rough, blades all in same plane

leafblade2
leafblade2
leafblade2
Leaf blade width

0.4 - 0.8 inches (10 - 20 mm) wide

leafblade
leafblade
leafblade
midrib
midrib
midrib
Stolon Presence

absent

Rhizome Presence

absent

Collar Type

continuous; may have hair on collar, white band on collar

collar
collar
collar
collar2
collar2
collar2
collar5
collar5
collar5
midrib
midrib
midrib
vernation4
vernation4
vernation4
Sheath Margin

split with overlapping margins

dscn1211 barnyardgrass
dscn1211 barnyardgrass
dscn1211 barnyardgrass
ligule
ligule
ligule
sheath
sheath
sheath
sheathmargin2
sheathmargin2
sheathmargin2
Sheath Type

flattened; sheath occasionally has short hairs; red- to purple-tinged at base

crown2
crown2
crown2
crown3
crown3
crown3