Pennsylvania smartweed (P. pensylvanicum) is one which grows well on rich, well drained soils and so is a weed problem in crops. A grass is a monocot, different biologically from a … Many small mammals, waterfowl and shorebirds flock to areas with smartweed colonies. You seem to have the control of crabgrass down, using the pre-emergent herbicide Dimension. Flowers are pinkish-purple and arranged in elongated clusters. Biological Management Options. Reliable biological information or cost-benefit analysis is rarely available to support weed management decisions. ID Characteristics. 01:32. These seeds are an important food source for wildlife, especially birds. How Preen Prevents Weeds ... Weed Characteristics. Branched, erect up to 4 feet tall and jointed with swollen nodes. Pennsylvania smartweed leaf. Will Tenacity Herbicide kill Pennsylvania smartweed? There are three species locally, all useable: The P. punctatum as well as P. densifolrum (compactly flowered) and the aforementioned P. hydropiperoides (water pepper.) Leaves are lance-shaped. Pennsylvania smartweed seedling. Swamp smartweed resembles Pennsylvania smartweed and ladysthumb in appearance; however, it is usually much larger and is a perennial that can reproduce by long, creeping, woody rhizomes. However, physical control is difficult because it can re-establish from seeds and remaining roots. Pinkweed, Purple-head. Synonyms. P. hydropiperoides has tannins, rutin (3% in leaves) quercitin, kaempferol and some protein. Videos. Polygonum pensylvanicum . Pennsylvania Smartweed Polygonum persicara. Please read the full disclaimer on herbicide usage. Will Ferti-Lome Broadleaf Weed Control with Gallery control Pennsylvania Smartweed? Smartweed, Pennsylvania; Smartweed, Pennsylvania. Leaf nodes are covered in papery, fringed sheaths. Family Polygonaceae Also Called Heart's Ease, Lady's Thumb. Stems. Does Snapshot 2.5 TG control Pennsylvania Smartweed? More Content from Plant Identification Cotyledons are narrow oval to lance-shaped with rounded tips. Preventative methods include proper drainage and low mowing as well as pre-emergent and postemergent herbicides containing triclopyr or clopyralid. Can Acclaim be used on Carex pensylvanica (Pennsylvania sedge)? Japanese knotweed or Mexican bamboo (P. cuspidatum), is a tall growing, perennial weed which is almost impossible to control. Description Perrenial herbaceous plant 15.2-30.4cm (6-24in) tall with red stem. It is considered a diuretic and has been used to stop intestinal and uterine bleeding, hasten menstruation and to treat hemorrhoids. Pennsylvania smartweed is also called pinkweed. Other names: pinkweed, Pennsylvania knotweed, pinweed, hearts-ease, purple head, swamp persicary: Leaf type: Broadleaf: Flowers: Pink, white: Lance-like leaves on multibranched stems with a low, spreading habit. It's a summer annual that prefers moist soil and can grow up to 4 feet in height. 2. In pasture, weed control decisions are based largely on visual thresholds and intuition. Life cycle: Summer annual ... Any material used for herbicidal control of any plant may vary in efficacy. Smartweed can be cut, and the roots can be dug up. Pennsylvania smartweed Polygonum pensylvanicum. At this time, there are no known biological controls for Smartweed; although, goats are known to forage on many types of emergent vegetation. The interesting pink flowers are a magnet for honeybees, pollinators and butterflies. Crabgrass is a summer annual grass, whereas Pennsylvania smartweed ( PSW) is a summer annual, broad-leaf weed. Because of this extensive root system it can be a strong competitor with other plants and is often difficult to control. Q&A related to Pennsylvania Smartweed. The plants are excellent erosion control and they help purify stagnant water as well. P. sahalinense is similar but much more robust. Leaves. Leaves are alternate, lance-shaped with pointed tips and smooth margins, usually hairless and occasionally with a purple watermark.