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Cassava brown streak
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Cassava 'brown streak' disease (CBSD) is an economically important constraint in important cassava-growing areas of East, Central and Southern Africa. In addition to causing a dry necrotic rot in the tuberous roots of infected plants, which can render them inedible, CBSD depresses yields through reducing plant growth. This pandemic of CBSD is driven by the high abundance of the whitefly vector, Bemisia tabaci, coupled with uncontrolled movements of infected cuttings used as planting material. This chapter describes the disease symptoms, distribution, economic impact, aetiology, epidemiology and management strategies of CBSD. The taxonomy, genome organization, diversity, host range, transmission and diagnostic methods of the causal agent are also described. Both host plant resistance and cultural methods are being used to manage the effects of the disease. Recent progress in both field- and laboratory-based experimentation to develop effective control strategies for CBSD means that there are improved prospects for tackling this important constraint to cassava production in future years.
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Permanent link to this itemhttps://hdl.handle.net/20.500.12478/1468
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Aetiology; Cassava; Yield Losses; Crop Yield; Taxonomy; Symptoms; Plant Viruses; Cultural Control; Plant Pests; Plant Pathogens; Plant Diseases; Disease Control; Cultural Methods; Insect Pests; Detection; Host Range; Geographical Distribution; Genomics; Genetic Variation; Disease Resistance Disease Transmission Disease Vectors Economic Impact Epidemiology
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Legg, J.P. (Taylor and Francis, 2012)Cassava is an important crop in many parts of the tropics, but it plays a particularly vital role in sustaining food security in sub-Saharan Africa. Diseases are the greatest biotic constraint to cassava production worldwide. Although the diversity of cassava pathogens is greatest in Latin America, the greatest impacts have been reported from Africa. Most significantly, the dual cassava viral pandemics caused by cassava mosaic virus disease (CMD) and cassava brown streak disease (CBSD) have affected ...
The role of the whitefly, Bemisia tabaci (Gennadius), and farmer practices in the spread of cassava brown streak ipomoviruses Maruthi, M.N.; Jeremiah, S.C.; Mohammed, I.U.; Legg, J.P. (2017)Cassava brown streak disease (CBSD) is arguably the most dangerous current threat to cassava, which is Africa's most important food security crop. CBSD is caused by two RNA viruses: Cassava brown streak virus (CBSV) and Ugandan cassava brown streak virus (UCBSV). The roles of the whitefly Bemisia tabaci (Gennadius) and farmer practices in the spread of CBSD were investigated in a set of field and laboratory experiments. The virus was acquired and transmitted by B. tabaci within a short time (5–10 ...
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