{"id":215,"date":"2015-06-09T08:55:22","date_gmt":"2015-06-09T12:55:22","guid":{"rendered":"http:\/\/site.extension.uga.edu\/tattnall\/?p=215"},"modified":"2015-06-09T08:55:22","modified_gmt":"2015-06-09T12:55:22","slug":"southern-rust-found-now-what","status":"publish","type":"post","link":"https:\/\/site.extension.uga.edu\/tattnall\/2015\/06\/southern-rust-found-now-what\/","title":{"rendered":"Southern Rust Found. Now What?"},"content":{"rendered":"
\"Here's<\/a>
Here’s some Southern Rust of Corn from a previous year. To date, none has been found in our area.<\/figcaption><\/figure>\n

Southern Corn Rust Found in Georgia. Now What?<\/p>\n

 <\/p>\n

Southern Rust of Corn was found in Southwest Georgia last week. I wanted to share some common questions I get about it from growers in Tattnall County. I asked Dr. Bob Kemerait, Extension Corn Specialist, and these are his answers.<\/p>\n

 <\/p>\n

    \n
  1. I see that southern rust was found in Georgia last week.\u00a0 Will a fungicide spray now still benefit me in Tattnall County even if we don\u2019t find it our area for 2-3 weeks?\u00a0 Would it be better to wait until it is closer or found in my area and then see what stage the corn is at?<\/li>\n<\/ol>\n

     <\/p>\n

    ANSWER: \u00a0This is a great question. \u00a0I believe that very little southern rust is present in the state now and most of it is probably in the very southern part of the state. \u00a0Growers in east Georgia are most probably at lower risk than those in SW and SC Georgia. \u00a0So- there is less urgency for growers in east Georgia to spray NOW. \u00a0However, rust can move quickly and rust can EXPLODE from seemingly nothing to SOMETHING rapidly once it ignites. \u00a0Bottom line: \u00a0for growers in east Georgia, I would likely wait to spray until initial tassel or until reports of rust in the immediate vicinity warrant an earlier application. \u00a0BUT- corn growers in east Georgia with good yield potential\u00a0WILL need to spray at least one fungicide application this year<\/p>\n

     <\/p>\n

      \n
    1. I planted my corn back in March.\u00a0 It\u2019s in the blister stage.\u00a0 How long do I really need to protect my corn from southern rust?<\/li>\n<\/ol>\n

       <\/p>\n

      ANSWER: \u00a0Another great question. \u00a0Blister stage is certainly at-risk. \u00a0Generally I feel you need to protect the crop until the hard dough stage, though some believe you need to protect until the black-layer.<\/p>\n

       <\/p>\n

        \n
      1. There are some really high priced fungicides out there for rust.\u00a0 How do you feel about tebuconazole\/Folicur compared to these other more expensive chemistries?<\/li>\n<\/ol>\n

         <\/p>\n

        ANSWER: \u00a0Tebuconazole is a good rust material, but not so good on other diseases like northern corn leaf blight. \u00a0Additionally, it does not have the length of protective window that strobilurin and strobilurin\/SDHI or strobilurin\/triazole fungicides have (2 versus 3 weeks of anticipated protection). \u00a0Last season rust was especially bad in Georgia because it showed up so early. \u00a0Tebuconazole protected yield, but growers who were hard-hit were better off using better, more expensive fungicides.<\/p>\n

         <\/p>\n

          \n
        1. \u00a0I spayed my corn crop with a strobilurin fungicide combination two weeks ago and now you report rust. \u00a0Should I go back out and spray at 2 weeks or wait until I reach the full 3 weeks?<\/li>\n<\/ol>\n

           <\/p>\n

          ANSWER: \u00a0I would advise waiting another week before making a second application. \u00a0As you have already sprayed and with a good product and rust pressure is in the initial stages,\u00a0better to take advantage of the full spray interval and be prepared for a long fight.<\/p>\n

          \"Here's<\/a>
          Here’s a close up of what Southern Rust of corn looks like.<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

          Southern Corn Rust Found in Georgia. Now What?   Southern Rust of Corn was found in Southwest Georgia last week. I wanted to share some common questions I get about it from growers in Tattnall County. I asked Dr. Bob Kemerait, Extension Corn Specialist, and these are his answers.   I see that southern rust […]<\/p>\n","protected":false},"author":97,"featured_media":216,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-215","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/posts\/215","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/users\/97"}],"replies":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/comments?post=215"}],"version-history":[{"count":1,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/posts\/215\/revisions"}],"predecessor-version":[{"id":218,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/posts\/215\/revisions\/218"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/media\/216"}],"wp:attachment":[{"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/media?parent=215"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/categories?post=215"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/tattnall\/wp-json\/wp\/v2\/tags?post=215"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}