{"id":14702,"date":"2023-09-01T09:30:13","date_gmt":"2023-09-01T13:30:13","guid":{"rendered":"http:\/\/132.236.156.160\/cuccap\/?p=14702"},"modified":"2024-01-02T14:42:14","modified_gmt":"2024-01-02T19:42:14","slug":"cuccap-scientists-find-high-prevalence-of-gummy-stem-blight-resistance-to-common-fungicides","status":"publish","type":"post","link":"http:\/\/132.236.156.160\/cuccap\/2023\/09\/01\/cuccap-scientists-find-high-prevalence-of-gummy-stem-blight-resistance-to-common-fungicides\/","title":{"rendered":"CucCAP scientists find high prevalence of gummy stem blight resistance to common fungicides"},"content":{"rendered":"<p><img decoding=\"async\" loading=\"lazy\" class=\"alignleft size-full wp-image-9889\" src=\"http:\/\/132.236.156.160\/cuccap\/wp-content\/uploads\/sites\/6\/2020\/11\/watermelon-small-logo.jpg\" alt=\"watermelon graphic\" width=\"100\" height=\"93\" \/>The gummy stem blight fungus, <em>Stagonosporopsis citrulli<\/em>, is now resistant to fungicides in four chemical classes. The newest resistance is to fungicides in FRAC Code 3. Most isolates (94% of 251) collected from watermelon in South Carolina in 2019 and 2021 were moderately resistant to tebuconazole, a fungicide widely used on watermelon because it is available in low-cost generic products. Highly resistant isolates were cross-resistant to five other fungicides in the same chemical class as tebuconazole: tetraconazole, flutriafol, difenoconazole, prothioconazole, and the newly registered mefentrifluconazole. Currently, only 4% of the isolates are highly resistant, so growers are encouraged to limit use of tebuconazole to one early season application to avoid shifting the population from moderately resistant to resistant.<\/p>\n<hr \/>\n<p>For further reading:<\/p>\n<ul>\n<li style=\"font-weight: 400\"><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/37311227\/\" target=\"_blank\" rel=\"noopener\"><strong>Widespread Resistance to Tebuconazole and Cross-Resistance to Other DMI Fungicides in <em>Stagonosporopsis citrulli<\/em> Isolated from Watermelon in South Carolina.<\/strong><\/a><br \/>\nBy: Anthony P. Keinath, Gabriel Rennberger, and Patrick Wechter<br \/>\nPublished in Plant Disease on June 13, 2023<br \/>\nDOI: <a href=\"https:\/\/apsjournals.apsnet.org\/doi\/10.1094\/PDIS-03-23-0478-RE\" target=\"_blank\" rel=\"noopener\">10.1094\/PDIS-03-23-0478-RE<\/a>.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>The gummy stem blight fungus, Stagonosporopsis citrulli, is now resistant to fungicides in four chemical classes. The newest resistance is to fungicides in FRAC Code 3.<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"quote","meta":{"footnotes":""},"categories":[419],"tags":[720,37,565,572],"_links":{"self":[{"href":"http:\/\/132.236.156.160\/cuccap\/wp-json\/wp\/v2\/posts\/14702"}],"collection":[{"href":"http:\/\/132.236.156.160\/cuccap\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/132.236.156.160\/cuccap\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/132.236.156.160\/cuccap\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"http:\/\/132.236.156.160\/cuccap\/wp-json\/wp\/v2\/comments?post=14702"}],"version-history":[{"count":4,"href":"http:\/\/132.236.156.160\/cuccap\/wp-json\/wp\/v2\/posts\/14702\/revisions"}],"predecessor-version":[{"id":15353,"href":"http:\/\/132.236.156.160\/cuccap\/wp-json\/wp\/v2\/posts\/14702\/revisions\/15353"}],"wp:attachment":[{"href":"http:\/\/132.236.156.160\/cuccap\/wp-json\/wp\/v2\/media?parent=14702"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/132.236.156.160\/cuccap\/wp-json\/wp\/v2\/categories?post=14702"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/132.236.156.160\/cuccap\/wp-json\/wp\/v2\/tags?post=14702"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}