Family Rural Lifestyle Controlling Woody Weeds Some weeds are as tough as iron to get rid of. By Jodi Henke Jodi Henke Resides In: Norwalk, IowaI was the writer and host of the Successful Farming/Living the Country Life National Radio programs and producer of the Successful Farming podcasts. Occasionally I write an article and produce photography for Successful Farming magazine. My beat included just about everything related to agriculture and life in the country. Was with Meredith for over 15 years and was also on the Board of Directors of the American Ag Editor's Association from 2014-2017. Prior to Meredith I was at WHO-AM in Des Moines, IA (using the name Jodi Chapman) as the Assistant News Director, Assignment Editor, news reporter and anchor. Successful Farming's Editorial Guidelines Published on October 18, 2016 Trending Videos Close this video player Staying ahead of weeds in the pasture can be a chore, especially woody weeds such as Buckbrush, Black Hawthorn, and Multiflora rose. Scott Hagood is an extension weed scientist at Virginia Tech University. He says the reason it's so hard to get the upper hand on woody perennials is because of their deep, extensive root structure. "There's just a large underground mass from which you must either deplete the underground storage starches and thereby kill the plant, or create a lethal concentration of a selective herbicide through that large underground mass," says Hagood. "Another aspect of these woody species is it's hard to, if you're talking about selective herbicide, penetrate the bark." Hagood says you're most likely to have the best control with selective herbicides when the plants are actively moving sugars to the root system. "These selective herbicides move in the plant with the flow of sugars so you want to apply those things such as that they'll be carried to the underground parts, which are in fact your target of this application," says Hagood. "That optimum timing is either in the early bloom stage earlier in the spring, or again in the fall before frost." If you only prefer mechanical control, remove the top of the plant when it's at its largest. Take off as much as you can above ground. This will cause the most drain on the underground system by forcing the plant to re-grow the top. However, Hagood says the easiest and most beneficial control of woody weeds is with a combination of selective herbicides and mechanical manipulation. You'll also need patience and persistence. Depending on the species, it may take several seasons to achieve acceptable control. Was this page helpful? Thanks for your feedback! Tell us why! Other Submit