梅花卷叶病的原因及防治方法?
梅花卷叶病的原因及防治方法,所谓卷叶病,是指梅花在水分缺乏状态下,叶片两边向正面中间对合卷缩,呈无精打采的萎蔫状态,是生理性病害。卷叶病不仅影响梅株的美观,而且严重时会导致叶片脱落。
诱发卷叶病的原因:长江流域夏季高温少雨,土壤干旱,空气湿度低,光照强,而梅树本身对水分的运送能力较差,其叶片多、叶质薄,水分蒸发又相对较快,在水分亏缺时极易发生卷叶现象。卷叶从5~6月开始,一直可持续到8~9月。雨后卷叶稍有缓和,叶片稍许平展。
在及时灌溉、水分充足供应的情况下,不会发生大量落叶,也不会影响到花芽分化。防治方法:梅花卷叶病是由梅花本身特别的解剖结构和生理特性,以及不良的气候因素共同作用的结果。因而在广大的梅花栽培地区,无法让梅花在整个生长季节始终保持叶片正常的平展状态。通过加强管理,使其根系生长发育良好,营养须根发达,树体壮实,增强植株的吸水运水能力,以避免或减少卷叶现象的发生。在高温干旱季节,要及时给予浇水和叶面喷水,保证卷叶不至于因过分严重而脱落。
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