{"id":12918,"date":"2026-06-20T12:25:48","date_gmt":"2026-06-20T12:25:48","guid":{"rendered":"https:\/\/dev.iita.org\/news-item\/the-witch-is-dead\/"},"modified":"2026-06-20T12:25:48","modified_gmt":"2026-06-20T12:25:48","slug":"the-witch-is-dead","status":"publish","type":"news-item","link":"https:\/\/iita.org\/fr\/news-item\/the-witch-is-dead\/","title":{"rendered":"The witch is dead"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><figure id=\"attachment_9357\" aria-describedby=\"caption-attachment-9357\" style=\"width: 180px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/newint.iita.org\/wp-content\/uploads\/2016\/10\/image_gallery-16-1.jpg\"><img decoding=\"async\" class=\"size-full wp-image-9357\" src=\"http:\/\/newint.iita.org\/wp-content\/uploads\/2016\/10\/image_gallery-16-1.jpg\" alt=\"A sorghum field severely infested with Striga. \" width=\"180\" height=\"135\" \/><\/a><figcaption id=\"caption-attachment-9357\" class=\"wp-caption-text\">A sorghum field severely infested with Striga. Witchweed causes annual losses of US$ 7 billion in cereal production in Sub-Saharan Africa.<br \/><a href=\"https:\/\/iita.org\/fr\/image\/image_gallery\/?uuid=85d139c6-ff52-4d83-84ad-b9bef4d5d128&amp;groupId=25357&amp;t=1272531856127\">Download High-Res<\/a><\/figcaption><\/figure><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IITA  and its partners have found a way to control the scourge of witchweed (Striga hermonthica) in Sub-Saharan Africa through a biocontrol agent. Striga infests some 50 million hectares of cereal crops, specifically maize, sorghum  and millet, causing farmers an estimated US$ 7 billion in annual losses  and affecting over 300 million people in the region.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><figure id=\"attachment_9358\" aria-describedby=\"caption-attachment-9358\" style=\"width: 180px\" class=\"wp-caption alignright\"><a href=\"http:\/\/newint.iita.org\/wp-content\/uploads\/2016\/10\/image_gallery-17.jpg\"><img decoding=\"async\" class=\"size-full wp-image-9358\" src=\"http:\/\/newint.iita.org\/wp-content\/uploads\/2016\/10\/image_gallery-17.jpg\" alt=\"A farmer angrily showing a Striga plant that he pulled from his field. \" width=\"180\" height=\"261\" \/><\/a><figcaption id=\"caption-attachment-9358\" class=\"wp-caption-text\">A farmer angrily showing a Striga plant that he pulled from his field. Farmers now have a natural  and cost-effective way to fight back the scourge of witchweed.<br \/>Download High-Res<\/figcaption><\/figure><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Developed by a team led by IITA plant pathologist Dr. Fen Beed with partners from the University of McGill (Canada)  and University of Hohenheim (Germany), the technology utilizes certain strains of Fusarium oxysporum (F. oxysporum) to fight the parasitic weed. The technology is cheap, environment-friendly  and safe as the fungus specifically targets witchweed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The fungal strains tested originated from Ghana, Mali  and Nigeria but, like witchweed, they are common throughout semi-arid Africa. The fungus can be easily grown in sterile water containing sorghum waste. The hard part was finding a way to coat seeds with it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Through experimentation, the team found that spores of the fungus can be mixed with liquefied Arabic gum &#8211; an organic adhesive extracted from trees  and commonly found in many SSA countries &#8211; without harming the fungus. The mixture is coated onto the seeds, dried then planted. The fungus remains viable for long periods, making the seeds amenable to storage. The fungus could also be directly dispersed into soil holes where the seeds are to be planted. The treated seeds produce crops that are free of the parasitic weed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>IITA and its partners have found a way to control the scourge of witchweed (Striga hermonthica) in Sub-Saharan Africa through a biocontrol agent. Striga infests some 50 million hectares of cereal crops, specifically maize, sorghum and millet, causing farmers an estimated US$ 7 billion in annual losses and affecting over 300 million people in the region.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"tags":[],"science-area":[],"program":[],"location":[],"news-type":[],"hub":[],"crop":[68],"impact-areas":[],"item-year":[186],"class_list":["post-12918","news-item","type-news-item","status-publish","hentry","crop-maize","item-year-186"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The witch is dead - IITA<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/iita.org\/fr\/news-item\/the-witch-is-dead\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The witch is dead - IITA\" \/>\n<meta property=\"og:description\" content=\"IITA and its partners have found a way to control the scourge of witchweed (Striga hermonthica) in Sub-Saharan Africa through a biocontrol agent. Striga infests some 50 million hectares of cereal crops, specifically maize, sorghum and millet, causing farmers an estimated US$ 7 billion in annual losses and affecting over 300 million people in the region.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/iita.org\/fr\/news-item\/the-witch-is-dead\/\" \/>\n<meta property=\"og:site_name\" content=\"IITA\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/IITA.CGIAR\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@IITA_CGIAR\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/iita.org\\\/news-item\\\/the-witch-is-dead\\\/\",\"url\":\"https:\\\/\\\/iita.org\\\/news-item\\\/the-witch-is-dead\\\/\",\"name\":\"The witch is dead - IITA\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/iita.org\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/iita.org\\\/news-item\\\/the-witch-is-dead\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/iita.org\\\/news-item\\\/the-witch-is-dead\\\/#primaryimage\"},\"thumbnailUrl\":\"http:\\\/\\\/newint.iita.org\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/image_gallery-16-1.jpg\",\"datePublished\":\"2026-06-20T12:25:48+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/iita.org\\\/news-item\\\/the-witch-is-dead\\\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/iita.org\\\/news-item\\\/the-witch-is-dead\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\\\/\\\/iita.org\\\/news-item\\\/the-witch-is-dead\\\/#primaryimage\",\"url\":\"http:\\\/\\\/newint.iita.org\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/image_gallery-16-1.jpg\",\"contentUrl\":\"http:\\\/\\\/newint.iita.org\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/image_gallery-16-1.jpg\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/iita.org\\\/news-item\\\/the-witch-is-dead\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/iita.org\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"News\",\"item\":\"https:\\\/\\\/iita.org\\\/news-item\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"The witch is dead\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/iita.org\\\/#website\",\"url\":\"https:\\\/\\\/iita.org\\\/\",\"name\":\"IITA\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/iita.org\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/iita.org\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/iita.org\\\/#organization\",\"name\":\"International Institute of Tropical Agriculture\",\"url\":\"https:\\\/\\\/iita.org\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\\\/\\\/iita.org\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/iita.org\\\/wp-content\\\/uploads\\\/2025\\\/07\\\/IITA-Logo-finalll.png\",\"contentUrl\":\"https:\\\/\\\/iita.org\\\/wp-content\\\/uploads\\\/2025\\\/07\\\/IITA-Logo-finalll.png\",\"width\":1788,\"height\":591,\"caption\":\"International Institute of Tropical Agriculture\"},\"image\":{\"@id\":\"https:\\\/\\\/iita.org\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/IITA.CGIAR\",\"https:\\\/\\\/x.com\\\/IITA_CGIAR\",\"http:\\\/\\\/www.linkedin.com\\\/company\\\/iita\",\"http:\\\/\\\/www.youtube.com\\\/user\\\/IITAPUBLISHING\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"The witch is dead - IITA","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/iita.org\/fr\/news-item\/the-witch-is-dead\/","og_locale":"fr_FR","og_type":"article","og_title":"The witch is dead - IITA","og_description":"IITA and its partners have found a way to control the scourge of witchweed (Striga hermonthica) in Sub-Saharan Africa through a biocontrol agent. 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