Lawn Weeds: Dallisgrass & Broomsedge

Dallisgrass

Dallisgrass is a warm-season, perennial clumping grass in the Paspalum family.  Well adapted to a variety of soils, it can be a major weed of turfgrass, often resembling crabgrass.  Crabgrass is an annual plant controlled with pre-emergent herbicides while Dallisgrass is a perennial for which there is no selective control. Dallisgrass is primarily a weed of turfgrass in lawns, but also occurs in pastures, roadsides, and occasionally agronomic crops.

Broomsedge

Broomsedge is a perennial weed frequently found in fields, along roadsides, and in openings to forests and pastures. It can be distinguished from other grasses by the flattened leaf sheaths which have obvious leaf hairs. Leaves with folded vernation arise from a basal crown. Immature plants are bluish green, however mature leaves turn light brown and appear to be dry. These upright leaves remain standing throughout the year.

Areas where Dallisgrass and Broomsedge are present will have to be sprayed with a nonselective herbicide such as Glyphosate.  Several applications are recommended in late July and August for best results.  This will help with the control of the both, but the desired turfgrass will have to be re-established with aeration and seeding.  Depending on the amount of Dallisgrass or Broomsedge, a partial or full renovation may be necessary.