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Carpetweed

Description

Carpetweed is a small weed that can cover large patches of ground in a very small time. This summer annual weed has smooth stems and leaves, and white flowers in the joint between leaf and stem. Carpetweed flowers from July to September.

Cultural Control

Maintain a dense, actively growing turf through proper mowing, fertilizing, and watering practices. Mow at the proper height for your selected adapted turfgrass. Coring and traffic control reduce compaction and encourage desirable turfgrass competition. It is best to control this summer annual broadleaf weed in late spring or early summer because it is easier to control at this time and the turf will have a greater chance of recovering the areas previously occupied by weeds.

Chemical Control

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

Preemergence and Postemergence Control

Herbicide and Formulation

mesotrione, MOA 27 (Tenacity) 4 SC

Amount of Formulation per 1,000 sq ft

0.092 to 0.183 fl oz

Amount of Formulation per Acre

4 to 8 fl oz

Pounds Active Ingredient per Acre

0.125 to 0.25

Precaution and Remarks

Use on residential turf, golf courses (not greens) and sod farms for pre- and postemergence weed control. Tolerant turfgrasses include St. Augustinegrass, centipedegrass, tall fescue, fine fescue, Kentucky bluegrass, and perennial ryegrass. Add a nonionic surfactant and repeat application after 2 to 3 weeks for improved postemergence control. Tank mix with Barricade 65 WG for extended preemergence grassy weed control. Can be applied at seeding to all tolerant grasses except fine fescue. After turf germination, wait 4 weeks or until turf has been mowed twice before making a postemergence application. Also controls henbit, chickweed, dandelion, white clover, Florida betony, Florida pusley, ground ivy, oxalis, wild violet, creeping bentgrass, and yellow nutsedge.

Preemergence and Postemergence Control

Herbicide and Formulation

sulfentrazone + prodiamine, MOA 14 + 3 (Echelon 4 SC) 4 SC

Amount of Formulation per 1,000 sq ft

0.184 to 0.826 fl oz

Amount of Formulation per Acre

0.5 to 2.25 pt

Pounds Active Ingredient per Acre

0.25 to 1.125

Precaution and Remarks

For use in residential and institutional lawns, athletic fields, sod farms, golf course fairways and roughs, roadsides, utility right-of-ways, railways, and industrial areas. Apply to turf following a second mowing if a good root system has been established. Apply up to 12 fluid ounces per acre to bentgrass at 0.5 inches or higher, fine fescue, and perennial ryegrass. Apply 18 to 24 fluid ounces per acre to perennial bluegrass, tall fescue, and all warm season grasses except St. Augustinegrass (do not apply) and bermudagrass (apply 18 to 36 fluid ounces per acre). For sod production, apply 6 months after establishment, and do not harvest within 3 months. Do not apply with adjuvants or surfactants. Echelon should not be applied to cool-season turf with N-containing fertilizers unless some short-term discoloration is tolerable.

Postemergence Control

Herbicide and Formulation

2,4-D amine, MOA 4 (various brands) 4 SL

Amount of Formulation per 1,000 sq ft

3 to 4 tsp

Amount of Formulation per Acre

1.5 to 2 pt

Pounds Active Ingredient per Acre

0.75 to 1

Precaution and Remarks

Cut rate one-half for bentgrass, carpetgrass, centipedegrass, and St. Augustinegrass. Spray when weeds are young and actively growing. To reduce danger of injury to flowers and ornamentals by spray drift, use low pressure and do not spray on windy days.

Carpetweed

Herbicide and Formulation

pyraflufen ethyl, MOA 14 (Octane 2% SC) 0.177 SC

Amount of Formulation per 1,000 sq ft

0.016 to 0.092 fl oz

Amount of Formulation per Acre

0.7 to 4 fl oz

Pounds Active Ingredient per Acre

0.000938 to 0.0055

Precaution and Remarks

Used in established sod farm and ornamental turf by commercial applicators and professional landscapers only. Turf can be newly seeded, sodded, or sprigged as long as it is established and not under stress. Tolerant turfgrasses include bermudagrass, centipedegrass, St. Augustinegrass, zoysiagrass, tall fescue, perennial ryegrass, perennial bluegrass, and creeping bentgrass (not greens or tees). Apply 1 to 4 fl ounces alone to 3- to 6-inch tall weeds. For larger weeds and broader spectrum control, apply 0.75 to 1.5 fl ounces and tank mix with 2,4-D, mecoprop, dicamba, chloroprop, MCPA, triclopyr, or fluroxypyr.

Presentations

Publications

Species Data

Growth Season/Life Cycle

summer annual weed

Growth Habit

prostrate, spreading; mat forming, plants root at the nodes, and form round whorls of leaves

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p1070195 carpetweed
p1070195 carpetweed
p1070195 carpetweed
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Leaflet Number

four or more

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leafarrangement
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Leaf Margin

smooth

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Leaf Hairs

none

Leaf/Leaflet Shape

oval/egg-shaped/elliptical

leafarrangement
leafarrangement
leafarrangement
Leaf Width

1/2 - 1 inch

leafarrangement
leafarrangement
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Leaf Venation

pinnate

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Leaf Arrangement

whorled or basal rosette

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Root Type

fibrous; taproot

Flower Color

white

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p1070200 carpetweed
p1070200 carpetweed
p1070200 carpetweed