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Curly Dock

Description

Curly dock is a perennial weed with a thick taproot. Leaves grow mostly at the base of the plant and are lance-shaped with wavy or curly margins. Leaf blades are 6 to 8 inches long and 1 to 2 inches wide. The green leaves may be tinged with reddish purple. Curly dock seldom produces seed in maintained turf. When the plants grow unchecked, small greenish flowers are produced in clusters at the top of the main stems. Flowers become reddish-brown at maturity. The shiny, reddish-brown triangular seed is surrounded by three sepals.

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.

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.

Postemergence Control

Herbicide and Formulation

dicamba, MOA 4 (Banvel) 4 SL

Amount of Formulation per 1,000 sq ft

1 to 2 tsp

Amount of Formulation per Acre

0.5 to 1 pt

Pounds Active Ingredient per Acre

0.25 to 0.5

Precaution and Remarks

Apply as foliar spray to growing weeds. Prevent injury to ornamentals. Avoid rooting zone of shallow-rooted trees and shrubs.

Postemergence Control

Herbicide and Formulation

diglycolamine, MOA 4 (Vanquish) 4 SL

Amount of Formulation per 1,000 sq ft

1 to 4.5 tsp

Amount of Formulation per Acre

0.5 to 2 pt

Pounds Active Ingredient per Acre

0.25 to 1

Precaution and Remarks

Do not exceed 1 pint per acre on bentgrass, carpetgrass, buffalograss, and St. Augustinegrass. Apply to newly seeded grasses after the second mowing. Do not exceed 0.25 pint per acre on extended sensitve plant roots on sandy soils and 0.5 pint per acre on clay soils.

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.

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

perennial weed

Growth Habit

upright; rosette

curlydock
curlydock
curlydock
curlydock2
curlydock2
curlydock2
curlydock3
curlydock3
curlydock3
curlydock dsc 7624
curlydock dsc 7624
curlydock dsc 7624
curlydock dsc 7625
curlydock dsc 7625
curlydock dsc 7625
curlydock p1180731
curlydock p1180731
curlydock p1180731
curlydock p1180733
curlydock p1180733
curlydock p1180733
curlydock winter 2007 48
curlydock winter 2007 48
curlydock winter 2007 48
p1020741
p1020741
p1020741
seedhead2
seedhead2
seedhead2
weed
weed
weed
weed2
weed2
weed2
Leaflet Number

one

weed2
weed2
weed2
Leaf Margin

wavy/crinkled

leaf
leaf
leaf
leafback
leafback
leafback
weed
weed
weed
Leaf Hairs

none

Leaf/Leaflet Shape

linear/oblong

curlydock dsc 7624
curlydock dsc 7624
curlydock dsc 7624
curlydock p1180731
curlydock p1180731
curlydock p1180731
curlydock winter 2007 48
curlydock winter 2007 48
curlydock winter 2007 48
leaf
leaf
leaf
leafback
leafback
leafback
p1020741
p1020741
p1020741
weed2
weed2
weed2
Leaf Width

1 - 2 inches

leaf
leaf
leaf
leafback
leafback
leafback
Leaf Venation

pinnate

curlydock p1180731
curlydock p1180731
curlydock p1180731
leaf
leaf
leaf
leafback
leafback
leafback
Leaf Arrangement

alternate

curlydock dsc 7624
curlydock dsc 7624
curlydock dsc 7624
curlydock p1180731
curlydock p1180731
curlydock p1180731
curlydock p1180733
curlydock p1180733
curlydock p1180733
curlydock winter 2007 48
curlydock winter 2007 48
curlydock winter 2007 48
seedhead2
seedhead2
seedhead2
weed
weed
weed
weed2
weed2
weed2
Root Type

taproot

Flower Color

the "flowers" consist of green achenes that turn reddish-brown and dry as the weed matures

curlydock
curlydock
curlydock
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curlydock2
curlydock2
curlydock3
curlydock3
curlydock3
floweringstem
floweringstem
floweringstem
immatureseeds
immatureseeds
immatureseeds
matureseedhead
matureseedhead
matureseedhead
seedhead
seedhead
seedhead
seedhead2
seedhead2
seedhead2
young old seed
young old seed
young old seed