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蟹爪兰常见3种病,夏天不可忽略!

Miss Chen
05-04
蟹爪兰是很多花友喜欢的绿植,属于仙人掌科附生肉质植物,观赏价值特别高,而且还可以嫁接到别的植物上,蟹爪兰正常养护是比较少生病,但是随着夏季的到来,温度超过30℃就会进入半休眠状态,抵抗力就会下降,再加上环境过湿,就会很容易生病,尤其是这3种病最频发,再不重视连盆都得扔,有需要的花友可以提前收藏哦!



1、炭疽病

蟹爪兰在夏季高温高湿环境下,特别容易感染炭疽病,主要作用在叶状茎,在发病初期叶面上呈水浸状小黄斑,慢慢的就会变成不规则的褐色或者黄褐色,并有纶纹排列的小黑点,很快就会传染到别的叶片,直至全株。

防治:平时要注意通风,盆内不可积水,如果枝条太过密集,要适当修剪掉一些,每隔一段时间可以用0.1%波尔多液喷洒植株,发病初期要及时把叶片摘除掉,并用60%代森锌稀释100倍喷洒植株,每周喷洒一次,连续喷洒3-4次。

2、腐烂病

腐烂病主要是高温高湿引起的一种病,蟹爪兰受害后,其基部组织就会变成褐色软腐,然后逐渐向两边蔓延,最后蔓延至全株导致坏死。

防治:适当控制浇水,增加土壤的透气性,在发病初期,及时把切除患病部位组织,并连带周围一部分健壮叶片一并切除,在伤口涂抹硫磺粉或者用3波美度石硫合剂,再用多菌灵喷洒植株。

3、叶枯病

叶枯病常发生在嫩叶尖端,发病时,由上向下发展,使叶片一步步变黄枯萎,它主要是有一种真菌侵害根部引起的,主要由浇水过量或者施重肥引起的一宗生理性病害,出现这种情况,就要赶紧把发病部位修剪掉,再脱盆修根,重新栽种。
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