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首页> 外文期刊>Plant Disease >The Incidence of Fusarium graminearum in Wild Grasses is Associated With Rainfall and Cumulative Host Density in New York
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The Incidence of Fusarium graminearum in Wild Grasses is Associated With Rainfall and Cumulative Host Density in New York

机译：野草中镰刀酸纤维素的发病率与纽约的降雨和累积宿主密度有关

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摘要

The movement of plant pathogens between cultivated and natural host communities can result in lost agricultural production and altered microbial or plant biodiversity. Fusarium graminearum incidence was studied in wild grass hosts for 3 years to better understand the ecology of this plant pathogen at the interface of crop fields and nonagricultural environments. Research sites (n = 23) were spread between regions of high and low agricultural production and included both agricultural and nonagricultural fields. Pathogen incidence in living grass spikes and senesced, overwintered stems varied between regions of New York and was lowest in a region with sparser agricultural production (P = 0.001). However, pathogen incidence within regions was similar at both agricultural and nonagricultural sites. The groundcover of crop and wild hosts within 1 km of sample sites were equally effective predictors of pathogen incidence, indicating either host group may drive pathogen spread. Rainfall in the 8 weeks preceding sample collection was strongly correlated with F. graminearum incidence in grasses, as well as an increased prevalence of F. graminearum in Fusarium spp. communities (P = 0.001). Grass species diversity was not associated with a reduction in pathogen incidence, and F. graminearum incidence did not vary among the most well-sampled grasses. These results indicate the pathogen colonizes and spreads in noncultivated grasses in a manner consistent with existing concepts of pathogen epidemiology in cereal crops. Increasing host acreage, whether cultivated or not, could drive the colonization of grasses in remote or protected environments, potentially altering their microbial communities.
机译：栽培和天然宿主社区之间的植物病原体的运动可能导致农业生产丧失和改变的微生物或植物生物多样性。在野草宿主中研究了镰刀菌·克柳肉素发病率3年，以更好地了解作物领域和非农业环境的界面处该植物病原体的生态学。研究网站（n = 23）在高和低农业生产区域之间传播，包括农业和非农业领域。病原体发病率在生活草尖峰和参培中，纽约地区之间的过度融化的茎各不相同，并且在稀疏农业生产的区域中最低（p = 0.001）。然而，在农业和非农业部位的区域内的病原发病率相似。作物和野生宿主的地基在1公里内的样品位点同样有效的病原发病率预测因子，表明宿主组可以驱动病原体扩散。在前面的样品收集前8周的降雨与草丛中的F. Graminearum发病率强烈相关，以及镰刀菌SPP的F. Graminearum的普遍率增加。社区（p = 0.001）。草地多样性与病原发病率的降低无关，F.Graminearum发病率在最良好采样的草丛中没有变化。这些结果表明了病原体在非经济性草地中植入和蔓延，其一种与谷物作物中病原体流行病学的现有概念一致。增加宿主面积，无论是否培养，是否可以在遥控器或受保护的环境中驾驶草地殖民，可能改变他们的微生物社区。

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