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黄瓜苗焦边症症状及防治措施

放大字体  缩小字体 发布日期:2018-06-08  来源:安信种苗官网  作者:青桐  浏览次数:33
核心提示:黄瓜苗枯边叶,植株叶片均可发生,但以中部叶片最重。发病叶片,多是在边缘或整个边缘发生干枯。
       一、黄瓜苗焦边症症状

    黄瓜苗枯边叶,植株叶片均可发生,但以中部叶片最重。发病叶片,多是在边缘或整个边缘发生干枯。
 

黄瓜3

    二、黄瓜苗焦边症病因

    1、土壤盐分浓度过高,造成的盐害;

    2、过速失水:在棚室内高温高湿情况下,突然放大风,叶片失水过急所致;

    3、药害:喷布农药时,药液浓度偏大,药液过多,滴留于叶缘造成药害。受到化学伤害的叶子边缘一般呈污绿色,干枯后变褐。

    三、黄瓜苗焦边症防治措施

    1、要配方施肥,适当减少施肥量或多施有机质,建议施用以色列大量元素水溶肥海法保瑞丰系列,大量元素水溶肥海法保瑞丰系列是以色列海法化学工业公司生产的全营养高效肥料,它含有各种配比的氮磷钾和微量元素,迅速补充作物在生长期所需大量元素和微量元素。

    2、盐分含量大的土壤(土表有白色盐类析出的土壤),可灌水洗盐。在夏季休闲期灌大水,连续多日泡田,使土壤中的盐分随水分的渗失而淋溶到深层土壤中去。

    3、科学放风,避免放风过急、过大。

 
关键词: 黄瓜苗焦边症
 
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