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First report of Impatiens downy mildew(Plasmopara obducens)in the UK

机译:英国凤仙花霜霉病(Plasmopara obducens)的首次报道

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摘要

In early June 2003,a sample of Impatiens walleriana Firefly Series from southern England was found with symptoms of a downy mildew.Infected leaves appeared paler green than normal,with a white,downy growth developing on lower surfaces.Symptoms were initially inconspicuous but lower leaf surfaces quickly became covered with fungus-like growth and premature leaf fall was common.Stunting of plants and poor flowering were also observed.Collapse of plants could be very rapid,especially under humid conditions,resulting in up to 80%losses.
机译:2003年6月上旬,从英格兰南部发现了一只凤仙花萤火虫系列样品,其症状为霜霉病。被感染的叶子看上去比正常情况浅绿色,下表面生长出白色的霜霉病。症状最初不明显,但叶子较低表面迅速被真菌样生长所覆盖,叶片早衰很普遍。还观察到植物发育迟缓和开花不良。植物的崩溃可能非常迅速,尤其是在潮湿条件下,损失高达80%。

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