{"id":3138,"date":"2023-07-06T23:35:32","date_gmt":"2023-07-07T03:35:32","guid":{"rendered":"https:\/\/site.extension.uga.edu\/applingcrop\/?p=3138"},"modified":"2023-07-20T08:53:40","modified_gmt":"2023-07-20T12:53:40","slug":"southern-corn-rust-2","status":"publish","type":"post","link":"https:\/\/site.extension.uga.edu\/applingcrop\/2023\/07\/southern-corn-rust-2\/","title":{"rendered":"Southern Corn Rust"},"content":{"rendered":"\n

Southern corn rust confirmed in Appling county. It wasn\u2019t spread wide across the field, and so little was on the leaf that I nearly missed it (not like the picture below). Nonetheless, it is here. If corn is between VT stage and R6 stage with good yield potential, consider applying a fungicide. Corn sprayed within the past 3 weeks should be ok (unless rain came too quickly after application). Corn is vulnerable to rust if has not reached hard dough stage, and\/or if it has been more than 3 weeks since a fungicide has been applied.<\/p>\n\n\n\n

If corn is within two weeks (50 percent starch line) of physiological maturity (black layer) it\u2019s unlikely that a fungicide will provide an economic benefit.

Triazole fungicides (like tebuconazole) are effective against rust and have a two week protective window, but lack the broader activity against northern corn leaf blight.  Strobilurin products and combination strobilurin\/triazole or strobilurin\/SDHI have 3 week protective intervals and also a broader spectrum of activity.<\/p>\n\n\n\n

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https:\/\/corn.ipmpipe.org\/southerncornrust\/<\/a> – for an up-to-date map on where southern corn rust has been confirmed. <\/p>\n","protected":false},"excerpt":{"rendered":"

Southern corn rust confirmed in Appling county. It wasn\u2019t spread wide across the field, and so little was on the leaf that I nearly missed it (not like the picture below). Nonetheless, it is here. If corn is between VT stage and R6 stage with good yield potential, consider applying a fungicide. Corn sprayed within […]<\/p>\n","protected":false},"author":217,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3138","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/posts\/3138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/users\/217"}],"replies":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/comments?post=3138"}],"version-history":[{"count":2,"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/posts\/3138\/revisions"}],"predecessor-version":[{"id":3165,"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/posts\/3138\/revisions\/3165"}],"wp:attachment":[{"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/media?parent=3138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/categories?post=3138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/applingcrop\/wp-json\/wp\/v2\/tags?post=3138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}