Soybean and wheat should not be harvested for seven to 10 days after application to allow herbicide translocation. We use cookies to make wikiHow great. Run the ropewick applicator in two directions across the field so the johnsongrass is wiped or wicked on both sides. There are 15 references cited in this article, which can be found at the bottom of the page. Curious about intermittent fasting? Adjuvants and cultivation in corn, soybean and cottonConsult the manufacturer's label for the appropriate adjuvant for postemergence herbicides. Type 2 or more characters into the input search below for suggested results, use up and down arrow keys to navigate through suggest box. © 1993 to document.write(new Date().getFullYear()) Curators of the University of Missouri, all rights reserved, DMCA and other copyright information. Johnsongrass seed can remain viable in the soil for more than 10 years. Plow immediately after you harvest. Prevent production of seed and its spread to new areas. This grass has broad leaves and grows 3 to 6 feet tall. If Johnson grass isn’t controlled, it can kill most of those crops or at least decrease crop production. In the home landscape, digging up and bagging the grass clumps can be an option but any broken off tillers (roots) can form new plants. Cultivation too soon after herbicide applications will reduce johnsongrass control as stems and rhizomes are broken before the herbicide can be translocated. How to Kill Johnson Grass. If regrowth occurs, sequential applications can be made with similar rates to 12-inch johnsongrass regrowth. During this period the government - and especially congressmen - sent out millions of free seed packets to their constituents as a way of assuring … For the best experience on our site, be sure to turn on Javascript in your browser. Dual-control trainer version of F-104C, 21 built. Kill or weaken established plants and their underground rhizome system. Severe infestations often result in pastures converted to row crops. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/d\/da\/Control-Johnson-Grass-Step-1.jpg\/v4-460px-Control-Johnson-Grass-Step-1.jpg","bigUrl":"\/images\/thumb\/d\/da\/Control-Johnson-Grass-Step-1.jpg\/aid9341591-v4-728px-Control-Johnson-Grass-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"