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Occurrence of cassava brown streak disease and associated Cassava brown streak virus and Ugandan cassava brown streak virus in the Comoros Islands

机译:科摩罗群岛发生木薯褐条纹病和相关的木薯褐条纹病毒和乌干达木薯褐条纹病毒

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Cassava brown streak disease (CBSD) has emerged as the most important viral disease of cassava (Manihot esculenta) in Africa and is a major threat to food security. The expanding CBSD epidemic in East and Central Africa is caused by two ipomoviruses (family Potyviridae), Cassava brown streak virus (CBSV; Monger et al., 2010) and Ugandan cassava brown streak virus (UCBSV; Winter et al., 2010). In 2014, symptoms of yellowing on leaves and brown necrotic rot on tuberous roots on different cassava landraces on the west coast of Mayotte (Maoré) were associated with CBSD and UCBSV (Roux-Cuvelier et al., 2014). Similar symptoms were observed in April 2015 in the north of Mayotte and in July and September 2016 in the three other islands of the Comoros archipelago: Grande Comore (Ngazidja), Anjouan (Ndzuwani) and Mohéli (Mwali) (Figs. 1). To evaluate the disease epidemic in the south-western Indian Ocean islands and to verify the identity of the causal agents, symptomatic leaf samples of 67 affected plants were collected and tested. 
机译:木薯褐色条纹病(CBSD)已成为非洲最重要的木薯病毒(Manihot esculenta)病毒病,对粮食安全构成重大威胁。在东部和中部非洲,不断扩大的CBSD流行病是由两种ipomoviruses病毒(波多病毒科)引起​​的,是木薯褐条纹病毒(CBSV; Monger等,2010)和乌干达木薯褐条纹病毒(UCBSV; Winter等,2010)。 2014年,马约特(Maoré)西海岸不同木薯地方品种的叶片发黄症状和块根上的褐色坏死腐烂症状与CBSD和UCBSV有关(Roux-Cuvelier等人,2014)。 2015年4月在马约特岛北部以及2016年7月和2016年9月在科摩罗群岛的其他三个岛屿:格兰德·科莫尔(Ngazidja),安茹安(Ndzuwani)和Mohéli(Mwali)观察到类似的症状(图1)。为了评估印度洋西南部岛屿上的疾病流行并验证病原体的身份,收集并测试了67株受影响植物的有症状叶片样品。

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