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Bulbous Buttercup

Description

Two of the common buttercups found in North Carolina are hairy buttercup and bulbous buttercup. Hairy buttercup appears to be predominant in the Piedmont and mountain regions, while bulbous buttercup is readily found in the Piedmont and Coastal Plain regions. Vegetative characteristics of bulbous buttercup are similar to those of hairy buttercup except for the bulb-like swelling at the base of the stem. This swelling is roundish and white, slightly flattened at the top and bottom. Smallflower buttercup is also found in North Carolina. Whereas bulbous and hairy buttercup have lobed leaves, most of the lower leaves of smallflower buttercup are unlobed.

Cultural Control

Perennial broadleaf turf weeds are capable of living more than two years. They thrive in weak, thin turf; golf fairways and roughs; home lawns; playfields; and industrial grounds. Proper turf maintenance is the key to control of this weed. First, select adapted turfgrass cultivars for your area and then properly fertilize, mow, and water to encourage dense growth.

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.

Presentations

Publications

Species Data

Growth Season/Life Cycle

winter annual or perennial weed

Growth Habit

upright; more prostrate in mowed turf situations; rosette

autopsy
autopsy
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Leaflet Number

one

Leaf Margin

divided into three lobes

venation
venation
venation
Leaf Hairs

dense hairs on upper surface

leafhairs
leafhairs
leafhairs
venation
venation
venation
Leaf/Leaflet Shape

oval/egg-shaped/elliptical

leafhairs
leafhairs
leafhairs
venation
venation
venation
Leaf Width

1/2 - 2 inches

leafhairs
leafhairs
leafhairs
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venation
venation
Leaf Venation

palmate

leafhairs
leafhairs
leafhairs
venation
venation
venation
Leaf Arrangement

alternate

flowerstem
flowerstem
flowerstem
Root Type

bulbous

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autopsy2
autopsy2
roots
roots
roots
Flower Color

yellow

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autopsy
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flower2
flower2
flower2
flower4
flower4
flower4
flowerstem
flowerstem
flowerstem
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