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Nimblewill

Description

Nimblewill is a dense perennial weed of turfgrass. It is often found at field edges and in forest openings, especially in shaded areas with adequate moisture. Nimblewill grows in a very dense mat, and will root at the nodes. It has very slender, thin leaves, which can be confused with bermudagrass. However, nimblewill has a membranous ligule, which can be distinguished from the hairy ligule of bermudagrass.

Cultural Control

Perennial grass weeds are not desirable as turfgrass species under any conditions. Therefore, every effort should be made to prevent these weedy grasses from becoming established in turf, as selective control measures are usually difficult. Selection of adapted turfgrass species and cultivars and the use of cultural practices are important in minimizing weedy grass encroachment and competition. Management practices include (1) mowing at the recommended height for the selected turfgrass and removing clippings when seedheads of grassy weeds are present; (2) applying the proper amount of nitrogen at the correct time according to the turfgrass present; and (3) using soil tests to determine needed nutrients and lime.

Chemical Control

Herbicide and Formulation
Amount of Formulation per 1,000 sq ft
Amount of Formulation per Acre
Pounds Active Ingredient per Acre

Postemergence Control

Herbicide and Formulation

topramezone, MOA 27 (Pylex) 2.8 L

Amount of Formulation per 1,000 sq ft

0.023 to 0.034 fl oz

Amount of Formulation per Acre

1 to 1.5 fl oz

Pounds Active Ingredient per Acre

0.021875 to 0.0328125

Precaution and Remarks

Labeled for spot treatment use in residential and athletic field turf. Can be broadcast in nonresidential turf sites including sod farms, golf courses (excluding greens and collars), parks, roadsides, cemeteries, and commercial properties. Tolerant turf species include Kentucky bluegrass, tall and fine fescue, perennial ryegrass, and centipedegrass at seeding and then anytime beyond 28 days after seeding. Add crop oil concentrate or methylated seed oil for enhanced control at 0.5 to 1% by volume. Don’t apply greater than 2 fl ounces per acre per application or 4 fluid ounces per acre per year. Bleaching intensity of susceptible weeds reduced and broadleaf weed spectrum increased if tankmixed with Drive XLR8, Onetime or Turflon Ester Ultra. For suppression of above-listed weeds, add Turflon Ester Ultra at 1 pound ae per acre and make either 2 or 3 applications at 3 to 4 week intervals depending on Pylex rate. Creeping bentgrass is marginally tolerant to Pylex at 0.25 fluid ounces per acre. Test on a small area before large-scale use. Sequential applications may be required to achieve desired level of weed control.

Presentations

Publications

Species Data

Seedhead/Flower

seedhead is a spike-like panicle, each spike contains a single seed with a long awn (bristle)

Vernation type

leaves rolled in the bud

vernation
vernation
vernation
Ligule Type

membranous; minute, irregular edge, less than 0.02 inches (0.5 mm) long

ligule
ligule
ligule
Growth Season/Life Cycle

perennial weed

Auricle type

absent

vernation
vernation
vernation
Leaf blade tip shape

sharp-pointed; flat, 1-2 inches (25 - 50 mm) long, not hairy except for occasional hairs on edges near the base

leafattach
leafattach
leafattach
leafblade2
leafblade2
leafblade2
leaftip
leaftip
leaftip
Leaf blade width

0.08 - 0.1 inches (2 - 2.5 mm) wide

leafattach
leafattach
leafattach
leafblade2
leafblade2
leafblade2
leaftip
leaftip
leaftip
Stolon Presence

present; fine

Rhizome Presence

present

Collar Type

continuous; hairy on edges

collar
collar
collar
vernation
vernation
vernation
Sheath Margin

open; usually a few long hairs on upper edges and near throat

sheathmargin
sheathmargin
sheathmargin
Sheath Type

flattened; sheath is smooth, shorter than internode