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Ivyleaf Speedwell

Description

Ivyleaf speedwell is a common North Carolina winter annual weed found in open fields and grassy areas along roadsides. This plant is low-growing and creeps along the ground like ivy. It has distinctive 3-5 lobed leaves that are densely hairy. Like the other speedwells, the leaves are both alternate (end of stem) and opposite (base of stem). Ivyleaf speedwell leaves are thicker and less serrated than those of either corn or Persian speedwell. Ivyleaf speedwell flowers in the spring. The flowers of both ivyleaf and Persian speedwell are blue and are borne on stalks longer than 1 mm, whereas those of corn speedwell are borne on stalks less than 1 mm in length. The seedpods are heart-shaped for all three species.

Cultural Control

Ivyleaf speedwell is common in North Carolina in open fields and grassy areas along roadsides. This plant is a low-growing winter annual that creeps along the ground like ivy. 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. A dense, vigorous turf is the best way to reduce the encroachment of this weed. First, select adapted turfgrass cultivars for your area and then properly fertilize, mow, and water to encourage dense growth. Ivyleaf speedwell is similar in appearance to Persian and corn speedwell, but is easier to control than corn speedwell.

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 weed

Growth Habit

prostrate, spreading

autopsy1
autopsy1
autopsy1
autopsy persian ivyleaf c2
autopsy persian ivyleaf c2
autopsy persian ivyleaf c2
corn l ivyleaf r speedw
corn l ivyleaf r speedw
corn l ivyleaf r speedw
p1030714
p1030714
p1030714
persian ivyleaf corn
persian ivyleaf corn
persian ivyleaf corn
taproot
taproot
taproot
weed2
weed2
weed2
weed5
weed5
weed5
weed7
weed7
weed7
Leaflet Number

one

Leaf Margin

serrated/toothed

leaves persian ivyleaf c
leaves persian ivyleaf c
leaves persian ivyleaf c
Leaf Hairs

upper/lower surface

leafhairs
leafhairs
leafhairs
leaves2
leaves2
leaves2
leaves4
leaves4
leaves4
leaves persian ivyleaf c
leaves persian ivyleaf c
leaves persian ivyleaf c
p1030716
p1030716
p1030716
p1030871
p1030871
p1030871
seedhead
seedhead
seedhead
stem flowers
stem flowers
stem flowers
weed2
weed2
weed2
Leaf/Leaflet Shape

heart/kidney/spade

leaves persian ivyleaf c
leaves persian ivyleaf c
leaves persian ivyleaf c
Leaf Venation

palmate

leaves persian ivyleaf c
leaves persian ivyleaf c
leaves persian ivyleaf c
Leaf Arrangement

lower leaves opposite, upper leaves alternate

Root Type

fibrous

taproot
taproot
taproot
Flower Color

blue/purple

flower
flower
flower
leaves2
leaves2
leaves2
seedhead
seedhead
seedhead
weed2
weed2
weed2
weed7
weed7
weed7