中文摘要：本研究于2006-2007年，在巴西圣保罗州Sumare市连续3次种植番茄，评估番茄田菜豆金黄花叶病毒的时间进程及其介体B型烟粉虱的丰度。在番茄商业种植田里随机选取试验田，每周监测有症状植株的发病率及烟粉虱成虫的数量。ToSRV被认为是致病因子，病毒基因组部分或完整的核苷酸测序已证实了ToSRV与其他巴西菜豆金黄花叶病毒的关系。作者通过拟合不同的发病率模型，分析病毒的时间进程。结果显示，单分子模型最匹配，这与最初的传播在ToSRV流行病学中的重要作用是一致的。在实验区的边界观测到的烟粉虱成虫较多，这意味着ToSRV的最初传播主要是来源于外源接种体，外源接种体以杂草及感染病毒的volunteer番茄植株为代表。本研究结果建议，番茄种植者应重视清除番茄收获后田间的老植株，因为在病毒传播到新番茄之前这些老植株会作为病毒的储藏所，并应注意清除田块周边的杂草以限制ToSRV最初的传播。
外文摘要：Temporal progress of a begomovirus disease in tomato fields and the abundance of its whitefly vector, Bemisia tabaci biotype B, were evaluated during three consecutive tomato plantings in the municipality of Sumare, state of Sao Paulo, Brazil, in 2006 and 2007. The incidence of symptomatic plants and the number of adult whiteflies were weekly monitored on experimental plots randomly chosen in tomato commercial fields. Tomato severe rugose virus (ToSRV) was identified as the causal agent of the disease, and its relationships with other Brazilian begomoviruses was confirmed by partial and complete nucleotide sequencing of the viral genome. The disease temporal progress was analysed by fitting different models to disease incidence. The monomolecular model showed the best fit, which is consistent with a predominant role of primary spread in the epidemiology of ToSRV. A higher number of adult whiteflies were observed at the borders of the plots, also suggesting primary spread of ToSRV from external sources of inoculum, which might be represented by weeds and volunteer tomato-infected plants. In Brazil, since 2004, there is a legislative measure that mandates, for some regions of processing tomato plantings, a 2-month crop-free period during the year. Based on our results, we suggest the extension of this measure to all tomato-producing regions, including fresh market tomato. We also suggest that growers emphasize the elimination of old plants from harvested fields that can serve as virus reservoirs several weeks prior to new plantings and weeds nearby the fields to limit the primary spread of ToSRV.
外文关键词：begomovirus；epidemiology；primary spread；Solanum lycopersicum；whiteflies
作者：Barbosa, Julio C.；Rezende, Jorge A. M.；Amorim, Lilian；等
作者单位：Univ Estadual Ponta Grossa
期刊名称：JOURNAL OF PHYTOPATHOLOGY
期刊影响因子：0.945
出版年份：2016
出版刊次：1
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