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Parsley-piert

Description

Parsley-piert is a freely branched winter annual about 1 to 3 inches tall. It closely resembles lawn burrweed and knawel. Leaves may be petiolate or sessile with a cone-shaped toothed portion (stipule) at the base that encircles the stem. The inconspicuous flowers are borne in axillary clusters and are surrounded by the stipules.

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.

Presentations

Publications

Species Data

Growth Season/Life Cycle

summer annual weed

Growth Habit

prostrate, spreading

knawel l parsley piert
knawel l parsley piert
knawel l parsley piert
knawel l parsley piert
knawel l parsley piert
knawel l parsley piert
p1040091 parselypiert
p1040091 parselypiert
p1040091 parselypiert
p1040225 parselypiert
p1040225 parselypiert
p1040225 parselypiert
p1050597 parselypiert
p1050597 parselypiert
p1050597 parselypiert
p1050736 parselypiert
p1050736 parselypiert
p1050736 parselypiert
p1060157 parselypiert
p1060157 parselypiert
p1060157 parselypiert
Leaf Margin

three-lobed with each lobe again three- to four-lobed

p1040094 parselypiert
p1040094 parselypiert
p1040094 parselypiert
p1040232 parselypiert
p1040232 parselypiert
p1040232 parselypiert
p1050745 parselypiert
p1050745 parselypiert
p1050745 parselypiert
Leaf Hairs

upper/lower surface

Leaf Width

<1/2 inch

Leaf Venation

palmate

p1040232 parselypiert
p1040232 parselypiert
p1040232 parselypiert
Leaf Arrangement

alternate

p1040094 parselypiert
p1040094 parselypiert
p1040094 parselypiert
p1040232 parselypiert
p1040232 parselypiert
p1040232 parselypiert
p1050745 parselypiert
p1050745 parselypiert
p1050745 parselypiert
p1060151 parselypiert
p1060151 parselypiert
p1060151 parselypiert
Root Type

fibrous; taproot

p1040227 parselypiert
p1040227 parselypiert
p1040227 parselypiert
p1050742 parselypiert
p1050742 parselypiert
p1050742 parselypiert
Flower Color

inconspicuous green flowers