%%EOF PERENNIAL WEEDS - HEMP DOGBANE, KNAPWEED, HORSERADISH General Information GENERAL INFORMATION This product, a water-soluble liquid, mixes readily with water and nonionic surfactant to be applied as a foliar spray for the control or destruction of many herbaceous and woody plants. That being said, it is important to know that dicamba cannot be applied as pre-harvest treatment on corn fields. Make firstapplicationwhentallfescueisgrowingandnomorethan tall.Asecondapplicationshouldbetimedtosprayregrowth, usually occurs 10 to 21 days after the firstapplication. For most perennials including hemp dogbane, horsenettle, common milkweed, pokeweed, hedge bindweed, multiflora rose, poison ivy, and wild blackberry, make applications from September 1 through October 15 or before a hard frost. Before domestic cotton was introduced and cultivated in the Southwest, around 700 A.D., leaf and stem fibers, hair or wool from dogs or wild animals, bird feathers, animal skins, or human hair were used to create prehistoric cordage. In forages, hemp dogbane is considered toxic to animals in both the fresh and dry forms. For weeds like hemp dogbane and bindweed, make applications before Oct. 1, and for quackgrass, other cool season grasses, and Canada thistle, try to make applications by Oct. 15. However, grazing animals seem to do a very good job of avoiding this plant when they have choices. These fibers were used as twine in basketry, mats, netting, rope, and other artifacts. Indian Hemp in British Columbia, Canada, June 1998. By: Bonnie L. Grant, Certified Urban Agriculturist. Researchers have explored various uses for hemp dogbane which include fiber … The pods are reddish brown, sickle shaped and 4 to 8 inches (10-20 cm.) Milestone can be tank-mixed with other herbicides and the addition of NIS is recommended to enhance activity. Hemp Dogbane Apocynum cannabinum. I made a really cool discovery in my backyard. johnsongrass, hemp dogbane, quackgrass, and others) are a primary concern since management options for controlling them in established alfalfa are limited. A combination of the above products may be the best solution for a mixture of different perennial weeds. The leaves grow on opposite sides of the stem and they will bear small white or light green flowers. whereas, hemp dogbane has exhibited some tolerance to glyphosate. Add 0.25% nonionic surfactant. SOYBEANS. Mowing and herbicides suppress hemp dogbane. First break off the stalk at ground level. It’s easy to understand how my friend was fooled, since Indian Hemp and the other dogbane species … It has become an agricultural pest which makes dogbane control important, especially in commercial garden regions. Description.—Hemp dogbane is from 2 to 4 feet high, with erect branches and sharp-pointed, short-stalked leaves from 2 to 6 inches long. Also known as "Indian hemp," Native American women made miles and miles of twine from the long fibers in the stems of dogbane. In pastures and hay fields, hemp dogbane represents a potential threat both as a weed capable of reducing yields and also as a poisonous plant to cattle, horses, and sheep. The plant in question turned out to be a dogbane, a species commonly called Indian Hemp (Apocynum cannabinum). Beacon (primisufuron) is another he… Hypocotyl is usually purple. Add nonionic surfactant to the spray mixture at 0.25% v/v (2 pt/100 of water) or a crop oil concentrate at 1% v/v (1 COC/100 gal. The Freeds sprayed in August with PastureGard HL at 24 ounces per acre. Young leaves are opposite and smooth. Leaves and stems contain a white, milky sap. This is a good, inexpensive herbicide with limitations. Hemp dogbane (Apocynum cannabinum L.) is a perennial weed in the dogbane family.It produces a milky sap (latex) when cut. Found throughout the United States. Ancient medicine used it as a sedative and treatment for syphilis, worms, fever, rheumatism and more. Sign up to get all the latest gardening tips! Click on an acronym to view each weed list, or click here for a composite list of Weeds of the U.S. Hemp Dogbane - Surmount at 3 to 6 pt/A is the best treatment we have found for hemp dogbane. Differential response has been attributed to less glyphosate absorption by hemp dogbane as compared to com-mon milkweed.3 The enhancement of herbicide toxicity by many surfactants has often been attributed to reduced surface tension and asso- ciated increases in leaf wettability and cuticle penetration. Research on poisonous plants is difficult and often depends on weather, soils, animal genetics, etc. Even its green legs have a metallic gleam. 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