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. Prostrate Knotweed. If cultural management is not improved, this troublesome weed will return each year. Take a minimum of 20 weed counts across the field. It specializes in stressed areas, favoring compacted soil and low nutrients, which … Effects On Crop Quality. 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. 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. It is one of the most common weeds along roadsides, edges of or cracks in sidewalks and pavement, and heavy-traffic areas in lawns. Often it'll start out in a small area where there will be a plant or two then if … Your program should rely on as many methods as possible in a pre-planned approach. Prostate knotweed can indirectly affect the development of field crops because it is a host for dodder and powdery mildew. Chemical control is the most effective route to take when managing prostrate knotweed. density, and reduce prostrate knotweed establishment next year. Corn gluten herbicides. cultural, biological, or chemical. It is suggested to avoid mowing areas infested with this weed to stop the seeds from spreading. Weed Control Techniques. For best results, a preemergent herbicide should be applied prior to seed germination. Scouting Techniques. This should not be common terminology. Prostrate knotweed grows well on compacted soils, especially roadsides and walking paths. Pre-emergence herbicides and corn gluten control far more than just crabgrass. is about the best you can do in glyphosate-tolerant crops … It will not kill existing prostrate knotweed in the lawn so it is best applied in early spring before knotweed seeds sprout. Apply a corn gluten herbicide in spring to reduce seed germination. Prostrate knotweed and its seeds can also survive mowing. Preen Lawn Crabgrass Control keeps a lid on new prostrate knotweed outbreaks in the lawn. 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. Knotweed is an invasive perennial weed that commonly infests lawns. Photo: Bruce Ackley, The Ohio State University, prostrate knotweed Polygonum aviculare This plant grows in many areas such as lawns, landscape plantings, and unmanaged sites. Knotweed Control: How To Get Rid of Knotweed. Knotweed has a habit of growing low to the ground and gradually spreads. Habitat: Prostrate knotweed occurs throughout Ontario in areas of moderately heavy foot- or wheel-traffic where the soils may be low in fertility and so heavily compacted that other plants are unable to survive. Fall knotweed control: If chemical control is necessary, knotweed can be controlled with broadleaf herbicides after emergence next year. Prostrate knotweed ... Knotweed exudes chemicals that inhibit the growth of nearby grasses. For Customer Service Call 1-800-233-1067 or Email Us. Pre-emergence herbicides are often referred to as crabgrass preventers. Note: Chemical control should only be used as a last resort, as organic approaches are … Control Tips.