Current status of bacterial wilt (Ralstonia solanacearum) disease in major seed potato (Solanum tuberosum L.) growing areas of Ethiopia

L. Tessema, Ebrahim Seid, G. Woldegiorgis, K. Sharma
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引用次数: 7

Abstract

On-site assessment and detection of plant diseases is a prerequisite to inspect the health status of seed potatoes and to make cost-effective disease management decisions. The present study was conducted in 60 major seed potato producing cooperatives of Ethiopia to assess the extent of potato bacterial wilt disease and to generate information on current status of R. solanacearum. The field assessment and inspection survey was conducted during 2015/16 for 3 seasons in 140 potato fields covering 123.30 hectares of seed potato. Symptomatic plants were confirmed for R. solanacearum by Agri Strip kit, potassium hydroxide (KOH) test and vascular flow (VF) techniques. The results of the study indicated that out of 140 seed potato fields assessed, 26 (equivalent to 18.57%) or some 33.3% of seed cooperatives were infested by bacterial wilt. The highest disease incidence (82.5%) was recorded in Jeldu district followed by Wonchi district (60%) where most of seed potato is being distributed to the country. Based on the results of three disease confirmation tools (Agri Strip, KOH and VF) implemented, 34.75 (28.18%) hectares of the fields showed positive results. Disease prevalence ranged from 0 to 100%. In some districts like Cheha, Doyo-gena and Shashamane, the disease prevalence was 100%, whereas 50% disease prevalence was recorded in Arsi-Negelle and Kofole districts. This study describes the current infestation level of bacterial wilt in major seed producing cooperatives of Ethiopia and potato production is highly threatened by Ralstonia solanacearum in most of the areas addressed by this survey
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埃塞俄比亚主要种子马铃薯种植区青枯病(Ralstonia solanacearum)的现状
植物病害的现场评估和检测是检查马铃薯种子健康状况和制定具有成本效益的病害管理决策的先决条件。本研究在埃塞俄比亚60个主要的种薯生产合作社进行,以评估马铃薯细菌性枯萎病的程度,并获得关于番茄枯萎病现状的信息。2015/ 2016年,对140块马铃薯田123.30公顷种子马铃薯进行了3个季节的田间评价和考察调查。采用Agri Strip试剂盒、氢氧化钾(KOH)检测和维管流动(VF)技术对茄青霉的症状植株进行鉴定。研究结果表明,在评估的140块马铃薯种田中,26块(相当于18.57%)或约33.3%的种子合作社发生了青枯病。该病发病率最高的是杰尔杜县(82.5%),其次是旺奇县(60%),大部分种子马铃薯都销往全国。采用3种疾病确认工具(Agri Strip、KOH和VF)的结果显示,34.75公顷(28.18%)农田呈阳性。患病率从0到100%不等。在Cheha、Doyo-gena和Shashamane等一些县,患病率为100%,而在Arsi-Negelle和Kofole县,患病率为50%。本研究描述了目前埃塞俄比亚主要种子生产合作社中青枯病的侵染水平,并且在本调查涉及的大多数地区,马铃薯生产受到番茄枯萎病的高度威胁
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