How do I control prostrate knotweed (Polygonum aviculare) in a fescue lawn in Greene County Virginia?
Website Resources: http://www.ppws.vt.edu/scott/weed_id/polav.htm http://www.turfweeds.net/plant_browse.php?do=view&id=62&batch=1&cache=1055270330 Recommendation: Prostrate knotweed thrives on compacted soil. In order to prevent future problems, the lawn should be core aerated to improve turfgrass growing conditions. Prostrate knotweed germinates in late Feb or early March at least 1 month before crabgrass. Next spring, apply isoxaben (Gallery™ at 0.5 oz/1000 ft2) in mid February or wait until prostrate knotweed has fully emerged and treat with products that contain at least two of the following ingredients: 2,4-D, dicamba, MCPP, triclopyr, and clopyralid. The same products can be used now but multiple treatments will be needed as prostrate knotweed gets older.
