Japanese Stiltgrass Herbicide
It is a colonial species that spreads during the summer and fall by rooting at stem.
Japanese stiltgrass herbicide. Milestone is a selective herbicide that effectively controls invasive shrubs and broadleaf plants such as japanese honeysuckle sericea lespedeza and japanese barberry that commonly grow in association with japanese stiltgrass. Mike mcgrath shares tips and tricks to getting rid of those pesky weeds in your lawn without all the fire and fury. Japanese stiltgrass is an early germinating warm season annual that is problematic in the mid atlantic region and spreading to the north and west. Prescriptions for elimination of japanese stiltgrass focus on reducing competition as early as practical in the season and preventing seed set.
If you have japanese stilt grass living in and through your lawn other than replacing your entire lawn with sod there are effectively only two options. For extensive stiltgrass infestations use of a systemic herbicide such as glyphosate e g roundup pro is a practical. Additional resources pdf hg88 invasive plant control in maryland. Post emergent is a fancy way of saying actively growing weeds that have already come up from soil.
Stiltgrass will be controlled but most perennial plants will regrow following treatment. Either pulling the weeds or killing them with a post emergent herbicide. Look for the active ingredient fenoxaprop. Pendimethalin pendulum imazapic panoramic and sulfometuron oust xp are effective against stiltgrass.
Japanese stiltgrass dominance can be reduced on infested sites by applying milestone at 5 to 7 fl oz a at growth. The herbicide quizalofop is grass selective and does not affect broadleaf plants. Stiltgrass is affected by quizalofop at low rates so you can control stiltgrass but leave most native grasses largely intact. Pendulum for example will prevent stiltgrass establishment when applied two to three weeks prior to germination but has little effect on plants that are already present.
Japanese stiltgrass may be driving you crazy but don t go for the torch just yet. If japanese stiltgrass is present in your lawn a postemergent herbicide labeled to control annual grass weeds like crabgrass can be used to spot treat young weeds. Japanese stiltgrass is an annual grass with all plants dying each fall. Stiltgrass is susceptible to a number of herbicides suitable for use in parks.
