density, and reduce prostrate knotweed establishment next year. Effects On Crop Quality. Photo: Bruce Ackley, The Ohio State University, Bugwood.org prostrate knotweed Polygonum aviculare This plant grows in many areas such as lawns, landscape plantings, and unmanaged sites. Prostrate Knotweed. Prostrate knotweed, Polygonum aviculare, has been around much longer than Ron Calhoun has, but he has learned a lot about it during the last 15 years. Weed Control Techniques. For Customer Service Call 1-800-233-1067 or Email Us. Controlling prostrate pigweed is not impossible and being persistent in your efforts to get rid of prostrate pigweed will be rewarded with a prostrate pigweed free yard. It specializes in stressed areas, favoring compacted soil and low nutrients, which … Prostrate knotweed grows well on compacted soils, especially roadsides and walking paths. Knotweed Control: How To Get Rid of Knotweed. Pull older plants rather than mowing over them, which can increase reseeding. Once emerged, Distinct can provide good control in conventional corn, while glyphosate (360 g/l) applied at two l/ac. If cultural management is not improved, this troublesome weed will return each year. It is one of the most common weeds along roadsides, edges of or cracks in sidewalks and pavement, and heavy-traffic areas in lawns. Preen Lawn Crabgrass Control keeps a lid on new prostrate knotweed outbreaks in the lawn. Scouting Techniques. Prostrate knotweed ... Knotweed exudes chemicals that inhibit the growth of nearby grasses. Note: Chemical control should only be used as a last resort, as organic approaches are … For best results, a preemergent herbicide should be applied prior to seed germination. Corn gluten herbicides. Often it'll start out in a small area where there will be a plant or two then if … Pre-emergence herbicides are often referred to as crabgrass preventers. Fall knotweed control: If chemical control is necessary, knotweed can be controlled with broadleaf herbicides after emergence next year. It is suggested to avoid mowing areas infested with this weed to stop the seeds from spreading. Knotweed is an invasive perennial weed that commonly infests lawns. Control Tips. cultural, biological, or chemical. is about the best you can do in glyphosate-tolerant crops … Apply a corn gluten herbicide in spring to reduce seed germination. Prostate knotweed can indirectly affect the development of field crops because it is a host for dodder and powdery mildew. Your program should rely on as many methods as possible in a pre-planned approach. Chemical control is the most effective route to take when managing prostrate knotweed. CORN: Prostrate knotweed is typically not a problem in corn because primary and secondary tillage remove the weed.Atrazine will provide good control when applied prior to the emergence of prostrate knotweed. 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