{"id":81093,"date":"2024-03-25T10:05:52","date_gmt":"2024-03-25T10:05:52","guid":{"rendered":"https:\/\/mohameday987.shop\/staging1\/?p=81093"},"modified":"2024-08-18T02:15:03","modified_gmt":"2024-08-18T02:15:03","slug":"%d8%a7%d9%84%d8%a8%d9%8a%d8%a7%d8%b6-%d8%a7%d9%84%d8%b2%d8%ba%d8%a8%d9%8a-%d8%b9%d9%84%d9%89-%d8%a7%d9%84%d8%aa%d8%a8%d8%ba-%d8%a7%d9%84%d8%b9%d9%81%d9%86-%d8%a7%d9%84%d8%a3%d8%b2%d8%b1%d9%82","status":"publish","type":"post","link":"https:\/\/worldofplants.ai\/en\/\u0627\u0644\u0628\u064a\u0627\u0636-\u0627\u0644\u0632\u063a\u0628\u064a-\u0639\u0644\u0649-\u0627\u0644\u062a\u0628\u063a-\u0627\u0644\u0639\u0641\u0646-\u0627\u0644\u0623\u0632\u0631\u0642\/","title":{"rendered":"Tobacco downy mildew (blue mold): 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\/\u0627\u0644\u0628\u064a\u0627\u0636-\u0627\u0644\u0632\u063a\u0628\u064a-\u0639\u0644\u0649-\u0627\u0644\u062a\u0628\u063a-\u0627\u0644\u0639\u0641\u0646-\u0627\u0644\u0623\u0632\u0631\u0642\/#%D8%A3%D8%B9%D8%B1%D8%A7%D8%B6_%D8%A7%D9%84%D8%A8%D9%8A%D8%A7%D8%B6_%D8%A7%D9%84%D8%B2%D8%BA%D8%A8%D9%8A_%D8%B9%D9%84%D9%89_%D8%A7%D9%84%D8%AA%D8%A8%D8%BA_%D8%A7%D9%84%D8%B9%D9%81%D9%86_%D8%A7%D9%84%D8%A3%D8%B2%D8%B1%D9%82\" >Symptoms of downy mildew on tobacco (blue mold)<\/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\/\u0627\u0644\u0628\u064a\u0627\u0636-\u0627\u0644\u0632\u063a\u0628\u064a-\u0639\u0644\u0649-\u0627\u0644\u062a\u0628\u063a-\u0627\u0644\u0639\u0641\u0646-\u0627\u0644\u0623\u0632\u0631\u0642\/#%D8%A3%D8%B3%D8%A8%D8%A7%D8%A8_%D8%A7%D9%84%D8%A8%D9%8A%D8%A7%D8%B6_%D8%A7%D9%84%D8%B2%D8%BA%D8%A8%D9%8A_%D8%B9%D9%84%D9%89_%D8%A7%D9%84%D8%AA%D8%A8%D8%BA_%D8%A7%D9%84%D8%B9%D9%81%D9%86_%D8%A7%D9%84%D8%A3%D8%B2%D8%B1%D9%82\" >Causes of downy mildew on tobacco (blue mold)<\/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\/\u0627\u0644\u0628\u064a\u0627\u0636-\u0627\u0644\u0632\u063a\u0628\u064a-\u0639\u0644\u0649-\u0627\u0644\u062a\u0628\u063a-\u0627\u0644\u0639\u0641\u0646-\u0627\u0644\u0623\u0632\u0631\u0642\/#%D8%A7%D9%84%D8%B8%D8%B1%D9%88%D9%81_%D8%A7%D9%84%D9%85%D9%86%D8%A7%D8%B3%D8%A8%D8%A9_%D9%84%D8%A7%D9%86%D8%AA%D8%B4%D8%A7%D8%B1_%D8%A7%D9%84%D8%A8%D9%8A%D8%A7%D8%B6_%D8%A7%D9%84%D8%B2%D8%BA%D8%A8%D9%8A_%D8%B9%D9%84%D9%89_%D8%A7%D9%84%D8%AA%D8%A8%D8%BA_%D8%A7%D9%84%D8%B9%D9%81%D9%86_%D8%A7%D9%84%D8%A3%D8%B2%D8%B1%D9%82\" >Suitable conditions for the spread of downy mildew on tobacco (blue mold)<\/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\/\u0627\u0644\u0628\u064a\u0627\u0636-\u0627\u0644\u0632\u063a\u0628\u064a-\u0639\u0644\u0649-\u0627\u0644\u062a\u0628\u063a-\u0627\u0644\u0639\u0641\u0646-\u0627\u0644\u0623\u0632\u0631\u0642\/#%D8%AF%D9%88%D8%B1%D8%A9_%D8%AA%D8%B7%D9%88%D8%B1_%D8%A7%D9%84%D8%A8%D9%8A%D8%A7%D8%B6_%D8%A7%D9%84%D8%B2%D8%BA%D8%A8%D9%8A_%D8%B9%D9%84%D9%89_%D8%A7%D9%84%D8%AA%D8%A8%D8%BA_%D8%A7%D9%84%D8%B9%D9%81%D9%86_%D8%A7%D9%84%D8%A3%D8%B2%D8%B1%D9%82\" >Development cycle of downy mildew on tobacco (blue mold)<\/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\/\u0627\u0644\u0628\u064a\u0627\u0636-\u0627\u0644\u0632\u063a\u0628\u064a-\u0639\u0644\u0649-\u0627\u0644\u062a\u0628\u063a-\u0627\u0644\u0639\u0641\u0646-\u0627\u0644\u0623\u0632\u0631\u0642\/#%D8%AE%D8%B3%D8%A7%D8%A6%D8%B1_%D8%A7%D9%86%D8%AA%D8%B4%D8%A7%D8%B1_%D8%A7%D9%84%D9%85%D8%B1%D8%B6\" >Losses of disease spread<\/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\/\u0627\u0644\u0628\u064a\u0627\u0636-\u0627\u0644\u0632\u063a\u0628\u064a-\u0639\u0644\u0649-\u0627\u0644\u062a\u0628\u063a-\u0627\u0644\u0639\u0641\u0646-\u0627\u0644\u0623\u0632\u0631\u0642\/#%D8%A7%D8%B3%D8%AA%D8%B1%D8%A7%D8%AA%D9%8A%D8%AC%D9%8A%D8%A9_%D8%A7%D9%84%D9%85%D9%83%D8%A7%D9%81%D8%AD%D8%A9_%D8%B6%D8%AF_%D8%A7%D9%84%D8%A8%D9%8A%D8%A7%D8%B6_%D8%A7%D9%84%D8%B2%D8%BA%D8%A8%D9%8A_%D8%B9%D9%84%D9%89_%D8%A7%D9%84%D8%AA%D8%A8%D8%BA_%D8%A7%D9%84%D8%B9%D9%81%D9%86_%D8%A7%D9%84%D8%A3%D8%B2%D8%B1%D9%82\" >Control strategy against tobacco downy mildew (blue mold)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/worldofplants.ai\/en\/\u0627\u0644\u0628\u064a\u0627\u0636-\u0627\u0644\u0632\u063a\u0628\u064a-\u0639\u0644\u0649-\u0627\u0644\u062a\u0628\u063a-\u0627\u0644\u0639\u0641\u0646-\u0627\u0644\u0623\u0632\u0631\u0642\/#%D8%AA%D8%AF%D8%A7%D8%A8%D9%8A%D8%B1_%D9%88%D9%82%D8%A7%D8%A6%D9%8A%D8%A9_%D9%84%D9%85%D9%86%D8%B9_%D8%AD%D8%AF%D9%88%D8%AB_%D8%A7%D9%84%D8%A8%D9%8A%D8%A7%D8%B6_%D8%A7%D9%84%D8%B2%D8%BA%D8%A8%D9%8A_%D8%B9%D9%84%D9%89_%D8%A7%D9%84%D8%AA%D8%A8%D8%BA\" >Preventive measures to prevent downy mildew on tobacco<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/worldofplants.ai\/en\/\u0627\u0644\u0628\u064a\u0627\u0636-\u0627\u0644\u0632\u063a\u0628\u064a-\u0639\u0644\u0649-\u0627\u0644\u062a\u0628\u063a-\u0627\u0644\u0639\u0641\u0646-\u0627\u0644\u0623\u0632\u0631\u0642\/#%D8%AA%D9%88%D8%B5%D9%8A%D8%A7%D8%AA_%D9%85%D9%83%D8%A7%D9%81%D8%AD%D8%A9_%D9%83%D9%8A%D9%85%D9%8A%D8%A7%D8%A6%D9%8A%D8%A9_%D9%88%D8%B9%D8%B6%D9%88%D9%8A%D8%A9\" >Chemical and organic control recommendations<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<p>Tobacco downy mildew (blue mold) is considered a fungal disease that seriously affects tobacco leaves. In this article on your site, WORLD OF PLANTS, we will discuss the symptoms and methods of prevention.<\/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%D8%A8%D9%8A%D8%A7%D8%B6_%D8%A7%D9%84%D8%B2%D8%BA%D8%A8%D9%8A_%D8%B9%D9%84%D9%89_%D8%A7%D9%84%D8%AA%D8%A8%D8%BA_%D8%A7%D9%84%D8%B9%D9%81%D9%86_%D8%A7%D9%84%D8%A3%D8%B2%D8%B1%D9%82\"><\/span><strong>Symptoms of downy mildew on tobacco (blue mold)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Scientific name<\/strong> : Downy mildew of tobacco<\/li>\n\n\n\n<li><strong>Type of disease<\/strong>: Innate<\/li>\n\n\n\n<li><strong>The causative fungus<\/strong> : Peronospora tabacina Adam<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>In the nursery, symptoms appear on seedlings bearing leaves 2-4 cm long in the form of clear, circular yellow spots on the upper surface of the leaves, offset by white, blue-violet, fuzzy growths on the lower surface. Figure<\/li>\n\n\n\n<li>Older seedling leaves appear wrinkled, distorted, often cup-shaped, dark in color, and may have dead areas.<\/li>\n\n\n\n<li>Infected plants are usually stunted in the field<\/li>\n\n\n\n<li>The infection usually begins on the lower leaves, as circular yellow spots appear on the upper surface, which are offset on the lower surface by white, blue-purple fuzz. As the infection progresses, the spots expand and the leaves dry out and take on a blackish color.<\/li>\n\n\n\n<li>The infection causes young plants to be severely stunted, and the leaves become narrow, short, and clearly mottled.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"1270\" height=\"1694\" src=\"https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-1.jpeg\" alt=\"Tobacco downy mildew (blue mold) - Plant World\" class=\"wp-image-81100\" title=\"Tobacco downy mildew (blue mold) - Plant World\" srcset=\"https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-1.jpeg 1270w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-1-768x1024.jpeg 768w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-1-1200x1600.jpeg 1200w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-1-64x85.jpeg 64w\" sizes=\"auto, (max-width: 1270px) 100vw, 1270px\" \/><figcaption class=\"wp-element-caption\">A picture showing you the beginning of the infection with downy mildew on tobacco (blue mold).<\/figcaption><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"1196\" src=\"https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-2.jpeg\" alt=\"Tobacco downy mildew (blue mold) - Plant World\" class=\"wp-image-81114\" title=\"Tobacco downy mildew (blue mold) - Plant World\" srcset=\"https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-2.jpeg 800w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-2-768x1148.jpeg 768w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-2-1200x1794.jpeg 1200w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-2-64x95.jpeg 64w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">A picture showing the symptoms of infection on the stem (on onion plants, where the fungus has many hosts: onions, tomatoes, eggplants, and tobacco).<\/figcaption><\/figure>\n<\/div>\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%D8%A8%D9%8A%D8%A7%D8%B6_%D8%A7%D9%84%D8%B2%D8%BA%D8%A8%D9%8A_%D8%B9%D9%84%D9%89_%D8%A7%D9%84%D8%AA%D8%A8%D8%BA_%D8%A7%D9%84%D8%B9%D9%81%D9%86_%D8%A7%D9%84%D8%A3%D8%B2%D8%B1%D9%82\"><\/span><strong>Causes of downy mildew on tobacco (blue mold)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Symptoms Symptoms of infection vary depending on the age of the plant and the time of infection<\/li>\n\n\n\n<li>Rain and wind through which the infection is transmitted.<\/li>\n\n\n\n<li>Lack of ventilation<\/li>\n\n\n\n<li>Increase nitrogen fertilization<\/li>\n\n\n\n<li>Climatic conditions (high humidity and moderate temperature)<\/li>\n\n\n\n<li>The presence of harmful weeds in the field.<\/li>\n\n\n\n<li>Failure to dispose of crop residues.<\/li>\n<\/ul>\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%86%D8%A7%D8%B3%D8%A8%D8%A9_%D9%84%D8%A7%D9%86%D8%AA%D8%B4%D8%A7%D8%B1_%D8%A7%D9%84%D8%A8%D9%8A%D8%A7%D8%B6_%D8%A7%D9%84%D8%B2%D8%BA%D8%A8%D9%8A_%D8%B9%D9%84%D9%89_%D8%A7%D9%84%D8%AA%D8%A8%D8%BA_%D8%A7%D9%84%D8%B9%D9%81%D9%86_%D8%A7%D9%84%D8%A3%D8%B2%D8%B1%D9%82\"><\/span><strong>Suitable conditions for the spread of downy mildew on tobacco (blue mold)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The spread of infection is suitable for low to moderate temperatures between 18 and 25 degrees Celsius, and a high relative humidity of no less than 80%.<\/p>\n\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%D8%A8%D9%8A%D8%A7%D8%B6_%D8%A7%D9%84%D8%B2%D8%BA%D8%A8%D9%8A_%D8%B9%D9%84%D9%89_%D8%A7%D9%84%D8%AA%D8%A8%D8%BA_%D8%A7%D9%84%D8%B9%D9%81%D9%86_%D8%A7%D9%84%D8%A3%D8%B2%D8%B1%D9%82\"><\/span><strong>Development cycle of downy mildew on tobacco (blue mold)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The infection is transmitted during the season from one plant to another, and from one field to another, through conidial spores that germinate when a film of water is present on the surface of the leaves, creating a germination tube that penetrates the leaf tissue and branches between the cells.<\/li>\n\n\n\n<li>In wet and cold weather, sporophores carrying conidial spores emerge on the lower surface of the leaves. Under appropriate conditions, the fungus forms about a million spores per square centimeter of the surface of the infected leaf. Spores usually form at night<\/li>\n\n\n\n<li>They mature at dawn, and spread during the morning, being carried by wind or rain spray, causing new infections.<\/li>\n\n\n\n<li>The asexual life cycle, from spore germination, infection, and formation of new spores, takes about 10 days and can be repeated several times during the host&#039;s growing season.<\/li>\n\n\n\n<li>In the advanced stages, oospores form on the tissues of dead infected plants. They resist unsuitable environmental conditions and can remain in the soil and on crop residues for a year or more.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%D8%AE%D8%B3%D8%A7%D8%A6%D8%B1_%D8%A7%D9%86%D8%AA%D8%B4%D8%A7%D8%B1_%D8%A7%D9%84%D9%85%D8%B1%D8%B6\"><\/span><strong>Losses of disease spread<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>In case of severe infestation, the stems and roots also become infected and take on a brown color. Weakness of the stems can lead to infected plants falling to the ground.<\/li>\n\n\n\n<li>In severe infections, the leaves fall before they reach full growth<\/li>\n\n\n\n<li>The result is low weight and poor quality of the crop.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1516\" height=\"944\" src=\"https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-4.jpeg\" alt=\"Tobacco downy mildew (blue mold) - Plant World\" class=\"wp-image-81129\" title=\"Tobacco downy mildew (blue mold) - Plant World\" srcset=\"https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-4.jpeg 1516w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-4-768x478.jpeg 768w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-4-18x12.jpeg 18w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-4-1200x747.jpeg 1200w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-4-64x39.jpeg 64w\" sizes=\"auto, (max-width: 1516px) 100vw, 1516px\" \/><figcaption class=\"wp-element-caption\">A picture showing the symptoms of a severe infection.<\/figcaption><\/figure>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"400\" src=\"https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-5.jpeg\" alt=\"Tobacco downy mildew (blue mold) - Plant World\" class=\"wp-image-81135\" title=\"Tobacco downy mildew (blue mold) - Plant World\" srcset=\"https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-5.jpeg 300w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-5-768x1024.jpeg 768w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-5-1200x1600.jpeg 1200w, https:\/\/worldofplants.ai\/wp-content\/uploads\/2024\/03\/word-image-81093-5-64x85.jpeg 64w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><figcaption class=\"wp-element-caption\">A picture showing the symptoms of infection on the fruit<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%D8%A7%D8%B3%D8%AA%D8%B1%D8%A7%D8%AA%D9%8A%D8%AC%D9%8A%D8%A9_%D8%A7%D9%84%D9%85%D9%83%D8%A7%D9%81%D8%AD%D8%A9_%D8%B6%D8%AF_%D8%A7%D9%84%D8%A8%D9%8A%D8%A7%D8%B6_%D8%A7%D9%84%D8%B2%D8%BA%D8%A8%D9%8A_%D8%B9%D9%84%D9%89_%D8%A7%D9%84%D8%AA%D8%A8%D8%BA_%D8%A7%D9%84%D8%B9%D9%81%D9%86_%D8%A7%D9%84%D8%A3%D8%B2%D8%B1%D9%82\"><\/span><strong>Control strategy against tobacco downy mildew (blue mold)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%D8%AA%D8%AF%D8%A7%D8%A8%D9%8A%D8%B1_%D9%88%D9%82%D8%A7%D8%A6%D9%8A%D8%A9_%D9%84%D9%85%D9%86%D8%B9_%D8%AD%D8%AF%D9%88%D8%AB_%D8%A7%D9%84%D8%A8%D9%8A%D8%A7%D8%B6_%D8%A7%D9%84%D8%B2%D8%BA%D8%A8%D9%8A_%D8%B9%D9%84%D9%89_%D8%A7%D9%84%D8%AA%D8%A8%D8%BA\"><\/span><strong>Preventive measures to prevent downy mildew on tobacco<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Avoid establishing nurseries in places where water accumulates, and it is preferable to establish them in new locations every year if possible, or sterilize them with hot steam, or using chemicals (Vapam, chlorine, methyl bromide, etc.).<\/li>\n\n\n\n<li>Getting rid of crop waste that could be a source of infection<\/li>\n\n\n\n<li>Avoid dense planting to reduce humidity around plants<\/li>\n\n\n\n<li>Watering early in the day so that the leaves dry before nightfall.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Removing harmful weeds inside the fields and on their edges to get rid of plants that could be a source of transmission of infection to crops.<\/li>\n\n\n\n<li>Practice the agricultural cycle.<\/li>\n\n\n\n<li>Regularly measure the humidity level in greenhouses with crops.<\/li>\n\n\n\n<li>Nitrogen fertilization.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%D8%AA%D9%88%D8%B5%D9%8A%D8%A7%D8%AA_%D9%85%D9%83%D8%A7%D9%81%D8%AD%D8%A9_%D9%83%D9%8A%D9%85%D9%8A%D8%A7%D8%A6%D9%8A%D8%A9_%D9%88%D8%B9%D8%B6%D9%88%D9%8A%D8%A9\"><\/span>Chemical and organic control recommendations<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Organic control<\/strong> : \n<ul class=\"wp-block-list\">\n<li>Destroying infected seedlings as soon as they appear in the nursery to prevent the spread of the infection to other healthy plants, and disposing of the remaining seedlings in the nursery after transferring the necessary ones, by burying them in the soil.<\/li>\n\n\n\n<li>Use healthy seeds, or treat them before planting with an appropriate fungicide.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Chemical control<\/strong>: \n<ul class=\"wp-block-list\">\n<li>Seedlings in the nursery can be protected from infection in infested areas by spraying them with a fungicide such as mancozeb and metalaxyl at the fourth leaf stage. Spraying is repeated every 7-10 days, and the last spray is 1-2 days before transplanting.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\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<p>References:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gisi, U. (2002). Chemical control of downy mildews. Advances in downy mildew research, 119-159<\/li>\n\n\n\n<li>Clayton, E. E., &amp; Gaines, J. G. (1939). Blue mold (downy mildew) disease of tobacco (No. 1799). US Government Printing Office<\/li>\n\n\n\n<li>Anderson, P. J. (1940). Control of downy mildew (on Tobacco seedlings). Bulletin. Connecticut Agricultural Experiment Station, 433, 193-206<\/li>\n\n\n\n<li>CLAYTON, Edward Eastman; GAINES, John Gordon. Downy mildew of tobacco. US Department of Agriculture, 1933<\/li>\n\n\n\n<li><a href=\"https:\/\/link.springer.com\/content\/pdf\/10.1007\/0-306-47914-1.pdf#page=124\" target=\"_blank\" rel=\"noopener\">CHEMICAL CONTROL OF DOWNY MILDEWS &#8211; pdf file<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.cabdirect.org\/cabdirect\/abstract\/19401101614\" target=\"_blank\" rel=\"noopener\">Control of downy mildew &#8211; cabidigitallibrary<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/books.google.com\/books?hl=ar&amp;lr=&amp;id=LZBxVNipUdwC&amp;oi=fnd&amp;pg=PA1&amp;dq=Downy+mildew+of+tobacco&amp;ots=3V4Vk5CvIW&amp;sig=0b244ruepMENFM5HtWV7eEH3I3g\" target=\"_blank\" rel=\"noopener\">Downy Mildew of Tobacco &#8211; google ebooks<\/a><\/li>\n<\/ul>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Tobacco downy mildew (blue mold) is considered a fungal disease that seriously affects tobacco leaves. In this article on your site, WORLD OF PLANTS, we will discuss the symptoms and methods of prevention.<\/p>","protected":false},"author":1,"featured_media":81129,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[363],"tags":[],"class_list":{"0":"post-81093","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-363","9":"description-off"},"acf":[],"_links":{"self":[{"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/posts\/81093","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=81093"}],"version-history":[{"count":3,"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/posts\/81093\/revisions"}],"predecessor-version":[{"id":86994,"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/posts\/81093\/revisions\/86994"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/media\/81129"}],"wp:attachment":[{"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/media?parent=81093"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/categories?post=81093"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/worldofplants.ai\/en\/wp-json\/wp\/v2\/tags?post=81093"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}