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首页> 外文期刊>Plant Pathology Journal >Soil-Borne Pathogens Infecting Sugar Beet in Southern Sweden
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Soil-Borne Pathogens Infecting Sugar Beet in Southern Sweden

机译：瑞典南部的土壤甜菜病原菌感染甜菜

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摘要

Using soil bioassays and isolations from field plants to survey soil-borne fungi causing sugar beet diseases in commercial fields in southern Sweden, damping-off pathogens, Aphanomyces cochlioides, Pythium sp. and Rhizoctonia solani, were the main pathogens found. Of the 1260 plants sampled from 28 fields, 8.5% were infected by these pathogens. Of 1120 seedlings grown in greenhouses in soil from these fields, 16.4% were infected by A. cochlioides and 10.7% were infected by Pythium sp. P. sylvaticum (for first time reported as a pathogen of sugar beet in Sweden). P. ultimum and A. cochlioides were also frequently isolated and were pathogenic in all tests. R. solani AG-2-1 was occasionally isolated and Fusarium sp. were frequently isolated, but were in most cases not pathogenic to test plants. Field soil sampling, seedling sampling, isolations and symptom assessments all indicated that Pythium sp. was predominantly the cause of pre-emergence damping-off, but diseased seedlings in later stages were infected mainly by A. cochlioides. In general, historically high-yielding fields in the area had less seedling diseases and damping-off problems than average yielding fields.
机译：使用土壤生物测定法和田间植物的分离物来调查引起瑞典南部商业领域甜菜病害的土壤传播真菌，抑制病原体，Aphanomyces cochlioides，Pythium sp.。被发现的主要病原体是茄子和枯萎病。从28个田地中采样的1260株植物中，有8.5％被这些病原体感染。在这些田地土壤温室中生长的1120棵幼苗中，16.4％的菌被A. cochlioides感染，10.7％的被Pythium sp。感染。 P. sylvaticum（在瑞典首次报道为甜菜的病原体）。终极体育杆菌和cochlioides也经常被分离出来，并且在所有测试中都具有致病性。偶尔分离到R. solani AG-2-1和镰刀菌。通常被分离出来，但在大多数情况下对测试植物没有致病性。田间土壤采样，幼苗采样，分离和症状评估均表明腐霉属。病原菌主要是出苗前减弱的原因，但后期患病的幼苗主要被A.cochlioides感染。一般而言，该地区历史上高产的田地比普通单产田少了幼苗病害和阻尼问题。

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