乌干达北部小农木薯种植系统中的木薯褐斑病流行情况:阿乔利次区域的案例

A. Kumakech, Allan Tekkara, L. Turyagyenda
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摘要

木薯褐条病 (CBSD) 是乌干达木薯的一种毁灭性病害。 有关乌干达北部木薯褐条病发病率和严重程度的信息十分有限。阿乔利(Acholi)次区域八(8)个县的木薯褐斑病发病率也不清楚。 因此,本研究旨在:a)确定阿乔利次区域的 CBSD 流行率和严重程度;b)确定阿乔利小农木薯种植系统中 CBSD 流行的驱动因素。2018b 季度对 120 块木薯田进行了评估。CBSD田间发病率最高的是Nwoya区(51.3%),最低的是Kitgum区(6.4%),次区域的严重程度从2.1到3.4不等。CBSD 流行率也是恩沃亚最高(76.2%),基特古姆和帕德尔区最低(30.8%)。使用易感染 CBSD 的品种(TME 14、TME 204 和 NASE 12)被认为是导致该流行病的主要原因。本研究的结果突出表明,有必要在阿乔利次区域广泛开展对 CBSD 的宣传,并建立以社区为基础的木薯种子繁殖和分配系统,以促进对耐受 CBSD 的木薯品种的吸收。
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Cassava Brown Streak Disease Prevalence in Smallholder Cassava Cropping Systems in Northern Uganda: The Case of Acholi Sub-region
Cassava brown streak disease (CBSD) is a devastating disease of cassava in Uganda.  Limited information exists on the incidence and severity of CBSD in Northern Uganda. The prevalence of CBSD in the eight (8) districts in the Acholi sub-region is also unknown.  Therefore, the current study intended to: a) determine the prevalence and severity of CBSD in the Acholi sub-region, and b) identify the drivers of CBSD epidemics in smallholder cassava cropping systems in Acholi. An assessment of 120 cassava fields was conducted in the 2018b season. CBSD field incidence was highest in Nwoya District (51.3%) and lowest in Kitgum (6.4%), with severity ranging from 2.1 to 3.4 in the sub-region. CBSD prevalence was also highest in Nwoya (76.2%) and lowest in Kitgum and Pader Districts (30.8%). The use of CBSD-susceptible varieties (TME 14, TME 204, and NASE 12) was identified as the main driver of the epidemic. The result of the current study highlights the need for a wide-scale CBSD awareness creation and community-based cassava seed multiplication and distribution system in the Acholi sub-region to promote the up-take of CBSD-tolerant cassava varieties
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