{"id":7694,"date":"2015-06-08T12:00:56","date_gmt":"2015-06-08T16:00:56","guid":{"rendered":"http:\/\/www.whatgrowsthere.com\/grow\/?p=7694"},"modified":"2015-06-02T11:50:21","modified_gmt":"2015-06-02T15:50:21","slug":"managing-leaf-spot-infections","status":"publish","type":"post","link":"https:\/\/whatgrowsthere.com\/grow\/2015\/06\/08\/managing-leaf-spot-infections\/","title":{"rendered":"Managing Leaf Spot Infections"},"content":{"rendered":"<div><\/div>\n<div>\n<div id=\"attachment_7712\" style=\"width: 310px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/whatgrowsthere.com\/grow\/wp-content\/uploads\/2015\/06\/IMG_4305.jpg\"><img aria-describedby=\"caption-attachment-7712\" decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-7712\" alt=\"Leaf spotting on Hosta\" src=\"https:\/\/whatgrowsthere.com\/grow\/wp-content\/uploads\/2015\/06\/IMG_4305-300x225.jpg\" width=\"300\" height=\"225\" srcset=\"https:\/\/whatgrowsthere.com\/grow\/wp-content\/uploads\/2015\/06\/IMG_4305-300x225.jpg 300w, https:\/\/whatgrowsthere.com\/grow\/wp-content\/uploads\/2015\/06\/IMG_4305-1024x768.jpg 1024w, https:\/\/whatgrowsthere.com\/grow\/wp-content\/uploads\/2015\/06\/IMG_4305.jpg 1600w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-7712\" class=\"wp-caption-text\">Leaf spotting on Hosta<\/p><\/div>\n<p>There are nearly 1,000 fungal pathogens that cause leaf spot diseases on garden plants. Fungal leaf spots vary in size\u2014from the size of a pinpoint to lesions that consume the entire leaf. Many leaf spots are tan to dark brown in color and may be circular, angular or irregular in shape.<\/p>\n<p>Some of the common leaf spot-causing fungi are <i>Alternaria, Ascochyta, Cercospora, Colletotrichum, Fusarium, Gloeosporium, Helminthosporium, Phyllosticta, Ramularia<\/i> and <i>Septoria<\/i>. Generally, they do not kill plants but mar their attractiveness.<\/p>\n<p dir=\"ltr\" align=\"left\">Most leaf spot diseases require cool conditions, wet foliage, high humidity and little air movement. Crowded plants often lead to leaf spot infections.\u00a0Long\u00a0intervals of\u00a0wet weather in spring and summer or overirrigating enhances infection outbreaks.<\/p>\n<p dir=\"ltr\" align=\"left\">The first rule is to keep foliage as dry as possible. Water at times of the day when the foliage will\u00a0quickly dry out; avoid late night\u00a0irrigation. Secondly, increase\u00a0air movement around plants.<\/p>\n<p dir=\"ltr\" align=\"left\">Learn to properly identify leaf spots by the symptoms\u00a0and adopt\u00a0the best control strategies.\u00a0Leaf samples may be sent to a diagnostic clinic\u00a0at your state&#8217;s university lab or local Extension office.<\/p>\n<p dir=\"ltr\" align=\"left\">A number of fungicides are labeled for controlling a wide range of leaf spot diseases.\u00a0Some of the\u00a0most effective\u00a0for\u00a0leaf spots include Pageant (pyraclostrobin + boscalid), Medallion (fludioxonil), Eagle\/Systhane (myclobutanil), Chipco 26 GT (iprodione) and Daconil (chlorothalonil).<\/p>\n<p dir=\"ltr\" align=\"left\">Remember that\u00a0fungicides are protectants and\u00a0not cure-alls. Applied the fungicide before symptoms (leaf spotting)\u00a0is detected. These products can\u00a0prevent fungal leaf spots from spreading. Good cultural practices and irrigation timing, along with proper preventative or control strategies will greatly reduce leaf spot severity.<\/p>\n<p><strong>Credit:<\/strong> Thank you to Paul Pilon, Ball Horticulture, Chicago for information in this blog.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>There are nearly 1,000 fungal pathogens that cause leaf spot diseases on garden plants. Fungal leaf spots vary in size\u2014from the size of a pinpoint to lesions that consume the entire leaf. Many leaf spots are tan to dark brown in color and may be circular, angular or irregular in shape. Some of the common [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[645,674,730,1217,625,1030,1031,630,113],"tags":[],"_links":{"self":[{"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/posts\/7694"}],"collection":[{"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/comments?post=7694"}],"version-history":[{"count":7,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/posts\/7694\/revisions"}],"predecessor-version":[{"id":7714,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/posts\/7694\/revisions\/7714"}],"wp:attachment":[{"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/media?parent=7694"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/categories?post=7694"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/whatgrowsthere.com\/grow\/wp-json\/wp\/v2\/tags?post=7694"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}