{"id":13050,"date":"2026-06-20T12:26:16","date_gmt":"2026-06-20T12:26:16","guid":{"rendered":"https:\/\/dev.iita.org\/news-item\/new-cassava-varieties-that-withstand-deadly-viral-diseases-released-in-tanzania\/"},"modified":"2026-06-20T12:26:16","modified_gmt":"2026-06-20T12:26:16","slug":"new-cassava-varieties-that-withstand-deadly-viral-diseases-released-in-tanzania","status":"publish","type":"news-item","link":"https:\/\/iita.org\/fr\/news-item\/new-cassava-varieties-that-withstand-deadly-viral-diseases-released-in-tanzania\/","title":{"rendered":"New cassava varieties that withstand deadly viral diseases released in Tanzania"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><a href=\"http:\/\/newint.iita.org\/wp-content\/uploads\/2016\/11\/image_gallery-6.jpg\"><img decoding=\"async\" class=\"alignright size-full wp-image-9719\" src=\"http:\/\/newint.iita.org\/wp-content\/uploads\/2016\/11\/image_gallery-6.jpg\" alt=\"image\" width=\"250\" height=\"170\" \/><\/a>Good news for cassava farmers! Tanzania has officially released new cassava varieties that could withst and both of the most devastating diseases of the crop: cassava brown streak (CBSD)  and cassava mosaic (CMD). These varieties provide hope for millions who depend on the crop for their food  and livelihood not only in Tanzania but also in other cassava-growing countries in sub-Saharan Africa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The two diseases have been spreading rapidly through the Great Lakes countries of eastern Africa from war-torn Democratic Republic of Congo to Rw anda, Burundi, Kenya, Ug anda, Tanzania, Mozambique  and Malawi, nearly reaching epidemic proportions as all the varieties presently grown by the farmers are susceptible.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mainly spread through sharing of infected planting materials  and by a vector \u2013 the whitefly \u2013 the diseases have caused an estimated 1 billion USD worth of damage to Africa\u2019s cassava, with poor smallscale farmers bearing the brunt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The new varieties, dubbed Pwani, Mkumba, Makutupora  and Dodoma, are a result of eight years of collaborative research  and conventional breeding work between Tanzanian Agricultural Research Institutes, IITA,  and CIAT.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Edward Kanju, a cassava breeder with IITA-Tanzania, who was also involved in the research, says that the varieties were developed by crossing local varieties with those introduced from Latin America from CIAT in Colombia. \u201cWe used local varieties from Tanzania as sources of resistance to CBSD  and for local adaptation  and those from CIAT as sources of high yield  and resistance to CMD  and cassava green mites,\u201d he said.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Aside from withst anding both the two diseases, the new varieties can easily double the crop\u2019s production with their potentially high yields (23- 51 tons\/ha against the current average yield of 10 tons\/ha). They also meet other local preferences such as taste, ease of cooking,  and texture.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">According to Geoffrey Mkamilo, the Team Leader of Cassava Research in Tanzania, the farmers will be very relieved  and happy as they have been eagerly awaiting these varieties as the two diseases, especially CBSD, have devastated production for many years.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cCBSD attacked at a time when we were starting to recover from years of battling CMD. CBSD is especially devastating because its symptoms are not always obvious.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Farmers looking forward to a good harvest get a rude shock when they harvest  and discover the useless rotten roots,\u201d he explained.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cAs a result, many have ab andoned this hardy crop. This is unfortunate as cassava performs relatively well even under harsh conditions such as poor soils  and little rainfall,\u201d he added.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The project was funded by the Rockefeller Foundation  and the Alliance for a Green Revolution in Africa. The Generation Challenge Program of the CGIAR also contributed funds for farmer participatory trials  and to complete tests required by the National Variety Release Committee before the new varieties could be officially released to farmers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The next challenge will be to get adequate planting material of the new varieties to cassava growers. At the moment, farmers mainly get their planting material from other farmers, NGOs,  and government agencies,  and supplies can be erratic.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To address this, cassava stakeholders are seeking to develop systems to enhance production, sale  and marketing of clean cassava planting material to meet the dem ands of both small-scale as well as commercial cassava growers. The combination of these new varieties, coupled with improved delivery systems, offers huge promise of a brighter future for cassava farmers in Tanzania  and in sub-Saharan Africa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">###<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour plus d'informations, veuillez contacter,<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dr. Geoffrey Mkamilo, <a>geoffreymkamilo@yahoo.co.uk<\/a><br>National Coordinator, Root  and Tuber Crops Research Programme,<br>Agricultural Research Institute Naliendele,<br>Tell +255 784 795 389<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dr. Edward Kanju, <a>e.kanju@cgiar.org<\/a><br>S\u00e9lectionneur de manioc<br>IITA-Tanzanie<br>T\u00e9l. +255 22 2700092<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Catherine Njuguna, <a>c.njuguna@cgiar.org<\/a><br>Charg\u00e9(e) de la communication d'entreprise (Afrique orientale et australe)<br>IITA-Tanzanie<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jeffrey Oliver, <a>o.jeffrey@cgiar.org<\/a><br>Charg\u00e9 de communication d'entreprise (international)<br>Bureau de la communication<br>IITA \u2013 Si\u00e8ge<br>Ibadan, Nig\u00e9ria<\/p>","protected":false},"excerpt":{"rendered":"<p>Good news for cassava farmers! Tanzania has officially released new cassava varieties that could withstand both of the most devastating diseases of the crop: cassava brown streak (CBSD) and cassava mosaic (CMD). These varieties provide hope for millions who depend on the crop for their food and livelihood not only in Tanzania but also in other cassava-growing countries in sub-Saharan Africa&#8230;<\/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":[27],"news-type":[],"hub":[],"crop":[66],"impact-areas":[],"item-year":[190],"class_list":["post-13050","news-item","type-news-item","status-publish","hentry","location-tanzania","crop-cassava","item-year-190"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>New cassava varieties that withstand deadly viral diseases released in Tanzania - 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\/new-cassava-varieties-that-withstand-deadly-viral-diseases-released-in-tanzania\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"New cassava varieties that withstand deadly viral diseases released in Tanzania - IITA\" \/>\n<meta property=\"og:description\" content=\"Good news for cassava farmers! 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