{"id":80444,"date":"2024-03-25T05:17:11","date_gmt":"2024-03-25T05:17:11","guid":{"rendered":"https:\/\/mohameday987.shop\/staging1\/?p=80444"},"modified":"2024-08-22T03:37:04","modified_gmt":"2024-08-22T03:37:04","slug":"early-blight-on-onion-leaves","status":"publish","type":"post","link":"https:\/\/worldofplants.ai\/en\/early-blight-on-onion-leaves\/","title":{"rendered":"Early blight on onion leaves: symptoms, causes, control"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 counter-hierarchy ez-toc-counter-rtl ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of contents of the article<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/worldofplants.ai\/en\/early-blight-on-onion-leaves\/#%D8%A3%D8%B3%D8%A8%D8%A7%D8%A8_%D8%A7%D9%84%D9%84%D9%81%D8%AD%D8%A9_%D8%A7%D9%84%D9%85%D8%A8%D9%83%D8%B1%D8%A9_%D8%B9%D9%84%D9%89_%D8%A7%D9%88%D8%B1%D8%A7%D9%82_%D8%A7%D9%84%D8%A8%D8%B5%D9%84\" >Causes of early blight on onion leaves<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/worldofplants.ai\/en\/early-blight-on-onion-leaves\/#%D8%A3%D8%B9%D8%B1%D8%A7%D8%B6_%D8%A7%D9%84%D9%84%D9%81%D8%AD%D8%A9_%D8%A7%D9%84%D9%85%D8%A8%D9%83%D8%B1%D8%A9_%D8%B9%D9%84%D9%89_%D8%A7%D9%88%D8%B1%D8%A7%D9%82_%D8%A7%D9%84%D8%A8%D8%B5%D9%84\" >Symptoms of early blight on onion leaves<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/worldofplants.ai\/en\/early-blight-on-onion-leaves\/#%D8%AF%D9%88%D8%B1%D8%A9_%D8%AA%D8%B7%D9%88%D8%B1_%D8%A7%D9%84%D9%84%D9%81%D8%AD%D8%A9_%D8%A7%D9%84%D9%85%D8%A8%D9%83%D8%B1%D8%A9_%D8%B9%D9%84%D9%89_%D8%A7%D9%88%D8%B1%D8%A7%D9%82_%D8%A7%D9%84%D8%A8%D8%B5%D9%84\" >Development cycle of early blight on onion leaves<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/worldofplants.ai\/en\/early-blight-on-onion-leaves\/#%D8%A7%D9%84%D8%B8%D8%B1%D9%88%D9%81_%D8%A7%D9%84%D9%85%D9%84%D8%A7%D8%A6%D9%85%D8%A9_%D9%84%D8%A5%D9%86%D8%AA%D8%B4%D8%A7%D8%B1_%D8%A7%D9%84%D9%84%D9%81%D8%AD%D8%A9_%D8%A7%D9%84%D9%85%D8%A8%D9%83%D8%B1%D8%A9_%D8%B9%D9%84%D9%89_%D8%A7%D9%88%D8%B1%D8%A7%D9%82_%D8%A7%D9%84%D8%A8%D8%B5%D9%84\" >Suitable conditions for the spread of early blight on onion leaves<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/worldofplants.ai\/en\/early-blight-on-onion-leaves\/#%D8%A7%D9%84%D8%AE%D8%B3%D8%A7%D8%A6%D8%B1_%D8%A7%D9%84%D9%86%D8%A7%D8%AA%D8%AC%D8%A9_%D8%B9%D9%86_%D8%A5%D9%86%D8%AA%D8%B4%D8%A7%D8%B1_%D8%A7%D9%84%D9%84%D9%81%D8%AD%D8%A9_%D8%A7%D9%84%D9%85%D8%A8%D9%83%D8%B1%D8%A9_%D8%B9%D9%84%D9%89_%D8%A7%D9%88%D8%B1%D8%A7%D9%82_%D8%A7%D9%84%D8%A8%D8%B5%D9%84\" >Losses resulting from the spread of early blight on onion leaves<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/worldofplants.ai\/en\/early-blight-on-onion-leaves\/#%D9%85%D9%83%D8%A7%D9%81%D8%AD%D8%A9_%D8%A7%D9%84%D9%84%D9%81%D8%AD%D8%A9_%D8%A7%D9%84%D9%85%D8%A8%D9%83%D8%B1%D8%A9_%D8%B9%D9%84%D9%89_%D8%A7%D9%88%D8%B1%D8%A7%D9%82_%D8%A7%D9%84%D8%A8%D8%B5%D9%84\" >Controlling early blight on onion leaves<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/worldofplants.ai\/en\/early-blight-on-onion-leaves\/#%D8%A7%D9%84%D8%A7%D8%AC%D8%B1%D8%A7%D8%A1%D8%A7%D8%AA_%D8%A7%D9%84%D9%88%D9%82%D8%A7%D8%A6%D9%8A%D8%A9_%D9%84%D8%A7%D9%84%D9%84%D9%81%D8%AD%D8%A9_%D8%A7%D9%84%D9%85%D8%A8%D9%83%D8%B1%D8%A9_%D8%B9%D9%84%D9%89_%D8%A7%D9%88%D8%B1%D8%A7%D9%82_%D8%A7%D9%84%D8%A8%D8%B5%D9%84\" >Preventive measures for early blight on onion leaves<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>Early blight is a disease that affects onion leaves, causing spots and leaf damage. This article from the \u201cWORLD OF PLANTS\u201d website provides an explanation of the symptoms of early blight on onion leaves and methods of prevention and control.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%D8%A3%D8%B3%D8%A8%D8%A7%D8%A8_%D8%A7%D9%84%D9%84%D9%81%D8%AD%D8%A9_%D8%A7%D9%84%D9%85%D8%A8%D9%83%D8%B1%D8%A9_%D8%B9%D9%84%D9%89_%D8%A7%D9%88%D8%B1%D8%A7%D9%82_%D8%A7%D9%84%D8%A8%D8%B5%D9%84\"><\/span><strong>Causes of early blight on onion leaves<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Disease name: Early blight on onion leaves<br>Scientific name: <em>Botrytis squamosa<\/em><br>Type of disease: fungal<br>Disease family: <em>Sclerotiniaceae<\/em><\/p>\n\n\n\n<p>Early blight or Botrytis leaf blight occurs mainly on onion leaves, where the fungus forms hardened structures on infected tissue that can persist in the soil for months to years.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%D8%A3%D8%B9%D8%B1%D8%A7%D8%B6_%D8%A7%D9%84%D9%84%D9%81%D8%AD%D8%A9_%D8%A7%D9%84%D9%85%D8%A8%D9%83%D8%B1%D8%A9_%D8%B9%D9%84%D9%89_%D8%A7%D9%88%D8%B1%D8%A7%D9%82_%D8%A7%D9%84%D8%A8%D8%B5%D9%84\"><\/span><strong>Symptoms of early blight on onion leaves<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The initial symptoms of the disease appear in the form of white, oval-shaped spots on onion leaves, with a watery back and a pale green halo forming around the spots. As the severity of the infection increases, the spots on the leaves increase, causing the tips of the leaves to die, and the entire leaves may eventually die.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"1250\" height=\"365\" src=\"https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/botrytis-leafspot-.png\" alt=\"Botrytis leafspot.\" class=\"wp-image-80456\" title=\"Early blight on onion leaves - Plant World\" srcset=\"https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/botrytis-leafspot-.png 1250w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/botrytis-leafspot--300x88.png 300w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/botrytis-leafspot--1024x299.png 1024w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/botrytis-leafspot--768x224.png 768w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/botrytis-leafspot--1200x350.png 1200w\" sizes=\"auto, (max-width: 1250px) 100vw, 1250px\" \/><figcaption class=\"wp-element-caption\">Development of early blight on onion leaves<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%D8%AF%D9%88%D8%B1%D8%A9_%D8%AA%D8%B7%D9%88%D8%B1_%D8%A7%D9%84%D9%84%D9%81%D8%AD%D8%A9_%D8%A7%D9%84%D9%85%D8%A8%D9%83%D8%B1%D8%A9_%D8%B9%D9%84%D9%89_%D8%A7%D9%88%D8%B1%D8%A7%D9%82_%D8%A7%D9%84%D8%A8%D8%B5%D9%84\"><\/span><strong>Development cycle of early blight on onion leaves<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Mushroom spores are transmitted by the wind and infect onion leaves. In the presence of suitable weather conditions, the fungi germinate and produce enzymes that kill the leaf tissue, causing spots to appear on the leaves.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%D8%A7%D9%84%D8%B8%D8%B1%D9%88%D9%81_%D8%A7%D9%84%D9%85%D9%84%D8%A7%D8%A6%D9%85%D8%A9_%D9%84%D8%A5%D9%86%D8%AA%D8%B4%D8%A7%D8%B1_%D8%A7%D9%84%D9%84%D9%81%D8%AD%D8%A9_%D8%A7%D9%84%D9%85%D8%A8%D9%83%D8%B1%D8%A9_%D8%B9%D9%84%D9%89_%D8%A7%D9%88%D8%B1%D8%A7%D9%82_%D8%A7%D9%84%D8%A8%D8%B5%D9%84\"><\/span><strong>Suitable conditions for the spread of early blight on onion leaves<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>To infect leaves, the fungus requires temperatures ranging between 15-20 degrees Celsius, and humid conditions where leaf surfaces are wet from dew or rain for long periods of up to 20 hours or more for leaf spots to develop.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"547\" height=\"478\" src=\"https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/c-users-ntc-desktop-1-1.png\" alt=\"C:\\Users\\NTC\\Desktop\\Onions\\Onion leaf blight\\download_image_1708886926959.png\" class=\"wp-image-80462\" title=\"Early blight on onion leaves - Plant World\" srcset=\"https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/c-users-ntc-desktop-1-1.png 547w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/c-users-ntc-desktop-1-1-300x262.png 300w\" sizes=\"auto, (max-width: 547px) 100vw, 547px\" \/><figcaption class=\"wp-element-caption\">Development of early blight symptoms<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%D8%A7%D9%84%D8%AE%D8%B3%D8%A7%D8%A6%D8%B1_%D8%A7%D9%84%D9%86%D8%A7%D8%AA%D8%AC%D8%A9_%D8%B9%D9%86_%D8%A5%D9%86%D8%AA%D8%B4%D8%A7%D8%B1_%D8%A7%D9%84%D9%84%D9%81%D8%AD%D8%A9_%D8%A7%D9%84%D9%85%D8%A8%D9%83%D8%B1%D8%A9_%D8%B9%D9%84%D9%89_%D8%A7%D9%88%D8%B1%D8%A7%D9%82_%D8%A7%D9%84%D8%A8%D8%B5%D9%84\"><\/span><strong>Losses resulting from the spread of early blight on onion leaves<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>If the infection is neglected, the disease spreads in the field, causing onion leaves to appear wilted and yellowish in color, leading to significant losses in the quantity and quality of the crop.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%D9%85%D9%83%D8%A7%D9%81%D8%AD%D8%A9_%D8%A7%D9%84%D9%84%D9%81%D8%AD%D8%A9_%D8%A7%D9%84%D9%85%D8%A8%D9%83%D8%B1%D8%A9_%D8%B9%D9%84%D9%89_%D8%A7%D9%88%D8%B1%D8%A7%D9%82_%D8%A7%D9%84%D8%A8%D8%B5%D9%84\"><\/span><strong>Controlling early blight on onion leaves<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li> Organic control: Avoid overhead spraying and use drip irrigation. Plant residues and harmful weeds must be eliminated in the field and fertilization should be stopped when the first symptoms appear.<\/li>\n\n\n\n<li>Chemical control: Fumigating the soil helps reduce the severity of the infection or using fungicides containing chlorthalonil or iprodione.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%D8%A7%D9%84%D8%A7%D8%AC%D8%B1%D8%A7%D8%A1%D8%A7%D8%AA_%D8%A7%D9%84%D9%88%D9%82%D8%A7%D8%A6%D9%8A%D8%A9_%D9%84%D8%A7%D9%84%D9%84%D9%81%D8%AD%D8%A9_%D8%A7%D9%84%D9%85%D8%A8%D9%83%D8%B1%D8%A9_%D8%B9%D9%84%D9%89_%D8%A7%D9%88%D8%B1%D8%A7%D9%82_%D8%A7%D9%84%D8%A8%D8%B5%D9%84\"><\/span><strong>Preventive measures for early blight on onion leaves<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Leave enough space between each plant to enhance air circulation in the field.<\/li>\n\n\n\n<li>Avoid planting onions in a field that has been infected for 3 years.<\/li>\n\n\n\n<li>Use disease-free seedlings.<\/li>\n\n\n\n<li>Use a good irrigation and drainage system to reduce soil moisture.<\/li>\n<\/ol>\n\n\n\n<p>In conclusion, we would like to note that we, at the world of plants website, offer you all the necessary services in the world of plants, we provide all farmers and those interested in plants with three main services::-<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/worldofplants.ai\/en\/consulting\/?utm_source=blog&amp;utm_medium=article bottom&amp;utm_id=blog\" data-type=\"link\" data-id=\"https:\/\/worldofplants.ai\/consulting?utm_source=blog&amp;utm_medium=article+bottom&amp;utm_id=blog\">Artificial intelligence consulting service to help you identify diseases that affect plants and how to deal with them<\/a><\/strong>.<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/worldofplants.ai\/en\/blog\/?utm_source=blog&amp;utm_medium=article bottom&amp;utm_id=blog\" data-type=\"link\" data-id=\"https:\/\/worldofplants.ai\/blog?utm_source=blog&amp;utm_medium=article+bottom&amp;utm_id=blog\">Blog about plants, plant diseases and care of various crops<\/a><\/strong> ... You are currently browsing one of her articles right now.<\/li>\n\n\n\n<li>An application that provides agricultural consultations to clients, as well as a service for imaging diseases and knowing their treatment for free \u2013 <strong><a href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.slyd4r.worldofplants\" data-type=\"link\" data-id=\"https:\/\/play.google.com\/store\/apps\/details?id=com.slyd4r.worldofplants\" target=\"_blank\" rel=\"noopener\">Click to download the Android version from Google Play Store<\/a><\/strong>\u060c <a href=\"https:\/\/apps.apple.com\/us\/app\/%D8%B9%D8%A7%D9%84%D9%85-%D8%A7%D9%84%D9%86%D8%A8%D8%A7%D8%AA%D8%A7%D8%AA\/id6479358008\" data-type=\"link\" data-id=\"https:\/\/apps.apple.com\/us\/app\/%D8%B9%D8%A7%D9%84%D9%85-%D8%A7%D9%84%D9%86%D8%A8%D8%A7%D8%AA%D8%A7%D8%AA\/id6479358008\" target=\"_blank\" rel=\"noopener\"><strong>Click to download the IOS version from the Apple App Store<\/strong><\/a>.<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Sources:<\/strong><\/li>\n<\/ul>\n\n\n\n<p><a href=\"https:\/\/plantix.net\/ar\/library\/plant-diseases\/100212\/botrytis-leaf-blight\/\" target=\"_blank\" rel=\"noopener\">Development of early blight symptoms<br><\/a><a href=\"https:\/\/ipm.ucanr.edu\/agriculture\/onion-and-garlic\/botrytis-leafspot\/#gsc.tab=0\" target=\"_blank\" rel=\"noopener\">Botrytis Leaf Blight &#8211; UNIVERSITY OF CALIFORNIA AGRICULTURE AND NATURAL RESOURCES<\/a><\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Early blight is a disease that affects onion leaves, causing spots and leaf damage. This article from the \u201cWORLD OF PLANTS\u201d website provides an explanation of the symptoms of early blight on onion leaves and methods of prevention and control.<\/p>","protected":false},"author":1,"featured_media":80467,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[356],"tags":[],"class_list":{"0":"post-80444","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-356","9":"description-off"},"acf":[],"_links":{"self":[{"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/posts\/80444","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/comments?post=80444"}],"version-history":[{"count":2,"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/posts\/80444\/revisions"}],"predecessor-version":[{"id":87321,"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/posts\/80444\/revisions\/87321"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/media\/80467"}],"wp:attachment":[{"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/media?parent=80444"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/categories?post=80444"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/tags?post=80444"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}