扶桑花叶子发黄：扶桑花叶子发黄的原因分析和处理方法

植物图片 2019-05-07 09:36

扶桑花在养植的过程中，有时候会出现黄叶的现象，有些花友就纳闷了，没长虫子，也没少施肥，怎么叶子就黄了呢?今天小编给大家分享一下关于扶桑花叶黄的几个原因。

扶桑花叶子发黄

扶桑花叶子发黄的原因分析和解决办法：

一、不合理浇水造成叶子变黄：缺水或者浇水过多，都会对扶桑花的生长有不利影响。扶桑喜水又不耐涝，怕干旱，不论是渍涝还是干旱，皆会造成叶子黄化，而且有脱落现象。浇水过多，盆土处于潮湿状态，就会引起烂根，造成落叶、落蕾。

解决办法：所以浇水要坚持盆土表层一干即浇才有助于植株生长良好，出现涝害也可能为雨水过多的原因。因此出现这一情况的花友可以回想一下平时浇水的习惯，如果浇水得当，那是不是由于雨水过多的缘故呢?如果是盆幼苗大，夏天高温蒸发快的时候，也要适度增加浇水频率。

二、缺乏必要养分(缺肥黄)造成叶子变黄：

解决办法：扶桑花在天气低于30度在考虑追施肥。每周施1次饼肥液，可保证开花繁茂。

三、缺乏光照(缺光黄)造成叶子变黄：

解决办法：扶桑花是强阳性植物，要求生长环境全阳，如长期过阴，光照不足，就会造成黄叶甚至叶子脱落的现象。

四、遭受虫害(病害黄)造成叶子变黄：

扶桑花如果出现病虫害，也会造成叶子发黄脱落，比如红植株、 白粉虱及其介壳虫等。

解决办法：(1)红蜘蛛主要危害叶子背面，发现之后全株用大水冲洗后喷施螨类专杀药剂即可，如螨净、克螨等;

(2)白粉虱主要寄生于叶背，刺入叶肉吸食其汁液，使叶子卷曲、退绿发黄，甚至干枯脱落。在白粉虱发生期间，用25%的扑虱灵可湿性粉剂1500倍至2000倍液喷雾，视虫情15天后再喷药一次，或用10%的吡虫啉可湿性粉剂2000倍液喷杀，只要将其成虫和若虫杀死，随着以后增加通风见光，反复喷水淋水即可洗去蜜露等，其上脏兮兮的霉层也将很快退去。家庭栽培条件下，在其成虫乱飞时，可试用灭蚊净喷洒，一举将其成虫击倒，再用湿布轻轻抹去其上的霉层，加强水肥管理，植株可很快恢复生机;

(3)介壳虫主要危害茎干、叶柄等处，大小、颜色不同，形状上有圆形、椭圆形等。对于介壳虫可用牙刷刷除或抹布擦拭干净，也可喷施洗衣粉、风油精0.2{bf}的溶液进行防治，或喷施杀扑磷等农药进行防治，效果皆良。

总结：扶桑花叶子发黄大部分时候是由于浇水或者光照影响，因此平时多加注意浇水适度，保持充分光照即可。

扶桑花叶子发黄

扶桑花养护心得：

扶桑花期甚长，在气温15℃一20℃条件下，全年开花不断。扶桑抗性强，管理较粗放，不用特殊管理，养护中只要掌握以下原则就能生长健壮。

1、换盆及修剪：一是换上新的营养土;二是剪去部分过密的卷曲的须根;三是施足基肥，盆底略加磷肥。

2、出房后管理：扶桑时阳性树种，5月初要移到室外摆在阳光充分处，此时也是扶桑的生长季节，要加强肥水、松土、拔草等管理工作。

美丽的扶桑花的花朵较大，而且全年都开花，有红色、黄色、粉色等。喜欢湿润、温暖的气候，对土壤的要求也不严，只要不过于寒冷，扶桑花变回生长得特别好!

专题： 扶桑 扶桑花
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