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Hairy 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. Hairy buttercup is a hairy plant with erect, hairy stems (single or branching from the base) and a fibrous root system. Vegetative characteristics of hairy buttercup are similar to those of bulbous buttercup, except for the bulb-like swelling at the base of the stem on bulbous buttercup. Smallflower buttercup is also found in North Carolina, and can be distinguished from hairy buttercup by the lack of hairs on its leaves. In addition, hairy and bulbous buttercup have lobed leaves, whereas most of the lower leaves of smallflower buttercup are unlobed.

Cultural Control

Winter annual broadleaf weeds germinate in the fall or winter and grow during any warm weather, which may occur in the winter, but otherwise remain somewhat dormant during the winter. They resume growth and produce seed in the spring and die as temperatures increase in late spring and early summer. They quickly invade thin turf areas especially where there is good soil moisture. Shade may also encourage growth. Many have a prostrate growth habit and are not affected by mowing. A dense, vigorous turf is the best way to reduce the encroachment of winter annual weeds. 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.

Postemergence Control

Herbicide and Formulation

clopyralid, MOA 4 (Lontrel) 3 EC

Amount of Formulation per 1,000 sq ft

0.1 to 0.5 fl oz

Amount of Formulation per Acre

0.25 to 1.33 pt

Pounds Active Ingredient per Acre

0.09 to 0.5

Precaution and Remarks

Do not apply to home lawns. May be used on bentgrass, Kentucky bluegrass, creeping, red, chewings, sheep and tall fescue, perennial ryegrass, bermudagrass, bahiagrass, buffalograss, centipedegrass, zoysiagrass, and St. Augustinegrass. Do not apply to putting greens and tees. Should be applied in a minimum of 20 gallons of water per acre. Surfactants are not necessary. Do not apply to exposed roots of certain trees and shrubs (legumes such as acacia, locust, mimosa, redbud, or mesquite) or Tilia spp. Do not use treated clippings for mulching and compost during the growing season of application.

Presentations

Publications

Species Data

Growth Season/Life Cycle

winter annual or perennial weed

Growth Habit

upright

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p1050895
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Leaflet Number

one

Leaf Margin

lobed

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Leaf Hairs

dense on both upper and lower surface

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Leaf/Leaflet Shape

oval/egg-shaped/elliptical

p1050226
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Leaf Width

1/2 - 2 inches

Leaf Venation

palmate

Leaf Arrangement

alternate

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Root Type

fibrous

p1050772
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p1050782
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Flower Color

yellow

p1050639
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