{"id":1241,"date":"2023-06-22T10:47:36","date_gmt":"2023-06-22T14:47:36","guid":{"rendered":"https:\/\/site.extension.uga.edu\/cook\/?p=1241"},"modified":"2023-06-22T10:47:37","modified_gmt":"2023-06-22T14:47:37","slug":"southern-corn-rust-in-clinch-grady-counties","status":"publish","type":"post","link":"https:\/\/site.extension.uga.edu\/cook\/2023\/06\/southern-corn-rust-in-clinch-grady-counties\/","title":{"rendered":"Southern Corn Rust in Clinch, Grady Counties"},"content":{"rendered":"\n

Southern corn rust is confirmed in Clinch Co and Grady Co.<\/p>\n\n\n\n

Growers who have sprayed a fungicide with mixed mode of action should get about 3 weeks of control. Will there be a need for a grower to spray a second time? Hopefully not but factors such as a) proximity to confirmed rust find, b) time since last application, and c) time remaining until hard-dough stage must be considered.<\/p>\n\n\n\n

FROM JUNE 6TH POST:<\/strong><\/p>\n\n\n\n

    \n
  1. Growers not at tassel can certainly wait for a fungicide application.<\/li>\n\n\n\n
  2. Growers at tassel or silking or pollinating stages can wait to make a fungicide application until southern rust is more of a threat (that is when we find it\u2026).<\/li>\n\n\n\n
  3. SOME corn growers do not want to take the risk of a) the first find of southern rust being missed OR b) having to scramble to make a fungicide application and hire a plane when everyone around them wants to spray also.  These farmers will often decide to spray now. I can\u2019t disagree with their logic.<\/li>\n\n\n\n
  4. Under current \u201clower risk\u201d situation, use of a single mode of action triazole like Tilt of Domark or Tebuconazole is less expensive, generally appropriate, and will have a protective window of about 2 weeks.  These fungicides are fair to good on southern rust, but less effective against northern and southern corn leaf blights.<\/li>\n\n\n\n
  5. Under current \u201clower risk\u201d situation, use of mixed products, ANY product that mixes a triazole + strobilurin, or triazole + SDHI, or SDHI + Strobilurin, or triazole + strobilurin + SDHI will provide 3 weeks of protection, better activity against rust, and better activity against corn leaf blights, but will be more expensive.<\/li>\n\n\n\n
  6. WHEN southern rust is a clear and present threat, choice of TOP fungicides for control (Things like Trivapro, Headline AMP, Veltyma, and others) becomes prudent.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    Southern corn rust is confirmed in Clinch Co and Grady Co. Growers who have sprayed a fungicide with mixed mode of action should get about 3 weeks of control. Will there be a need for a grower to spray a second time? Hopefully not but factors such as a) proximity to confirmed rust find, b) […]<\/p>\n","protected":false},"author":38,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1241","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/site.extension.uga.edu\/cook\/wp-json\/wp\/v2\/posts\/1241","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/site.extension.uga.edu\/cook\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/site.extension.uga.edu\/cook\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/cook\/wp-json\/wp\/v2\/users\/38"}],"replies":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/cook\/wp-json\/wp\/v2\/comments?post=1241"}],"version-history":[{"count":1,"href":"https:\/\/site.extension.uga.edu\/cook\/wp-json\/wp\/v2\/posts\/1241\/revisions"}],"predecessor-version":[{"id":1243,"href":"https:\/\/site.extension.uga.edu\/cook\/wp-json\/wp\/v2\/posts\/1241\/revisions\/1243"}],"wp:attachment":[{"href":"https:\/\/site.extension.uga.edu\/cook\/wp-json\/wp\/v2\/media?parent=1241"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/cook\/wp-json\/wp\/v2\/categories?post=1241"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/cook\/wp-json\/wp\/v2\/tags?post=1241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}