{"id":4320,"date":"2024-04-07T19:56:15","date_gmt":"2024-04-07T23:56:15","guid":{"rendered":"https:\/\/site.extension.uga.edu\/colquittag\/?p=4320"},"modified":"2024-04-07T19:56:15","modified_gmt":"2024-04-07T23:56:15","slug":"cotton-burndown-questions","status":"publish","type":"post","link":"https:\/\/site.extension.uga.edu\/colquittag\/2024\/04\/cotton-burndown-questions\/","title":{"rendered":"Cotton Burndown Questions.."},"content":{"rendered":"\n<p>Cutleaf eveningprimrose and wild radish have traditionally been troublesome weeds to manage in reduced-till fields. The most effective and economical option for controlling primrose and radish is an application of 2,4-D alone or mixed with any Roundup mixture (such as Roundup + Valor) at least 30 days before planting. For primrose, 2,4-D at 12 oz\/A of a 3.8 lb\/gal formulation mixed with Roundup is sufficient and would reduce the interval between application and planting non-Enlist cotton cultivars; however, rates of 1.0 to 1.5 pt\/A are needed for wild radish. Dicamba will also control primrose when mixed with Roundup; dicamba is not very effective on wild radish.<\/p>\n\n\n\n<p>For growers who do not want to put 2,4-D or dicamba in their sprayers, Liberty or a combination of Roundup plus Valor are options to provide fair (70 to 80%) control of pre-blooming primrose; full blooming primrose will be controlled about 15% better. For wild radish, regardless of growth stage, Roundup mixtures containing Harmony Extra are effective. After radish is in full bloom, Roundup + Valor will provide 75 to 90% control. Additionally, once primrose and radish are in full bloom, good to excellent control should be achieved with paraquat plus Direx.<\/p>\n\n\n\n<p><strong><em>What are my plant back restrictions when using Valor in cotton burndown?<\/em><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>In strip-till cotton where the strip till rig (including ripper shank) is run after application and before planting, Valor plant-back intervals are as follows:<br>1) &gt;30% ground cover = 7 days<br>2) 10\u201330% ground cover = 14 days plus 0.5&#8243; rain\/irrigation<br>3) &lt;10% ground cover or tillage = 21 days plus 1&#8243; rain\/irrigation<br><br><\/li>\n\n\n\n<li>In no-tillage production or when the strip is implemented prior to<br>application. Valor plant-back interval should be 28 days. Additionally,<br>0.5&#8243; (&gt;10% ground cover) or 1&#8243; (&lt;10% ground cover) rainfall\/irrigation is<br>needed. <strong><em>If Reflex (or generic) will be applied PRE, suggest adding an<br>additional 7 days to planting intervals.<br><br><\/em><\/strong><\/li>\n\n\n\n<li>Add a nonionic surfactant or crop oil concentrate (preferred), regardless of<br>glyphosate brand.<\/li>\n<\/ul>\n\n\n\n<p><strong><em>What rate do I need to burndown my small grain cover crop?<\/em><\/strong><\/p>\n\n\n\n<p>According to the UGA Pest Management Handbook if you are using<strong> <em>paraquat<\/em><\/strong><em> then apply 0.63 lb ai for wheat and 0.5 lb ai for rye cover crop; cover crops must be mature (seed heads present) for adequate control.<\/em><\/p>\n\n\n\n<p>If you are using glyphosate then consider control of cover crops:<br>Wheat &lt; 12&#8243;: 0.56 lb ae<br>Wheat &gt; 12&#8243;: 0.75 lb ae<br>Rye &lt; 12&#8243;: 0.56 lb ae<br>Rye &gt; 12&#8243; (no seed head): 1.13 lb ae<br>Rye &gt; 12&#8243; (seed head): 0.56 lb ae<\/p>\n\n\n\n<p>Below is data evaluating wild radish control by burndown herbicides from Dr. Stanely Cupepper, UGA Weed Scientist from years back.  <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/site.extension.uga.edu\/colquittag\/files\/2022\/03\/image-24.png\"><img loading=\"lazy\" decoding=\"async\" width=\"863\" height=\"434\" src=\"https:\/\/site.extension.uga.edu\/colquittag\/files\/2022\/03\/image-24.png\" alt=\"\" class=\"wp-image-4321\" srcset=\"https:\/\/site.extension.uga.edu\/colquittag\/files\/2022\/03\/image-24.png 863w, https:\/\/site.extension.uga.edu\/colquittag\/files\/2022\/03\/image-24-300x151.png 300w, https:\/\/site.extension.uga.edu\/colquittag\/files\/2022\/03\/image-24-768x386.png 768w\" sizes=\"auto, (max-width: 863px) 100vw, 863px\" \/><\/a><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Cutleaf eveningprimrose and wild radish have traditionally been troublesome weeds to manage in reduced-till fields. The most effective and economical option for controlling primrose and radish is an application of 2,4-D alone or mixed with any Roundup mixture (such as Roundup + Valor) at least 30 days before planting. For primrose, 2,4-D at 12 oz\/A [&hellip;]<\/p>\n","protected":false},"author":67,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,47,38,28],"tags":[],"class_list":["post-4320","post","type-post","status-publish","format-standard","hentry","category-cotton","category-cover-crops","category-weed-managment","category-weed-resistance"],"_links":{"self":[{"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/posts\/4320","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/users\/67"}],"replies":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/comments?post=4320"}],"version-history":[{"count":3,"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/posts\/4320\/revisions"}],"predecessor-version":[{"id":6450,"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/posts\/4320\/revisions\/6450"}],"wp:attachment":[{"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/media?parent=4320"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/categories?post=4320"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/colquittag\/wp-json\/wp\/v2\/tags?post=4320"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}