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Smallflower Buttercup

Description

Smallflower buttercup may resemble a wild violet in its early growth, but later in the life cycle it produces upright stems that are slender and branch from the base of the plant. Lower leaves are dark green and rounded, while upper leaves are a brighter green and elongate with occasional lobes. Flowers, which appear from April to August, are tiny and yellow with five petals. The plant can grow to heights of 6 - 24 inches. Smallflower buttercup reproduces by seed. This weed grows in both dry and moist environments and is commonly found in fields, waste areas, and wooded habitats. It 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

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 biennial or perennial weed

Growth Habit

upright

autopsy 1
autopsy 1
autopsy 1
Leaflet Number

one

Leaf Margin

most of the lower leaves exhibit crinkled leaf margins, while upper leaves tend to have smooth margins

autopsy
autopsy
autopsy
Leaf Hairs

most of the lower leaves are heart-shaped and unlobed, whereas the upper leaves tend to be elongated and occasionally lobed

Leaf Venation

pinnate

Leaf Arrangement

opposite; whorled or basal rosette

autopsy 1
autopsy 1
autopsy 1
flowers 1
flowers 1
flowers 1
leaves and stem
leaves and stem
leaves and stem
Root Type

fibrous

Flower Color

yellow

flowers 1
flowers 1
flowers 1
flowers 2
flowers 2
flowers 2