峨眉蔷薇的病虫害防治

植物图片 2021-03-05 13:54

提起蔷薇相信大家都是非常熟悉的，开出来的花朵是那么的鲜艳，让人着迷。但是峨眉蔷薇大家知道吗？它也是蔷薇中的一种，喜欢在阳光多的地方生长。可是在生长的过程中免不了会受到病虫的伤害，那要怎么进行防治呢？我们就一起来看看吧。

1.白粉病

它很可能在叶片、叶柄和嫩梢以及花蕾上面发病。在成叶上面生出来一些不规则的白粉状斑点，然后病叶子就会从叶子尖上面，或者是叶子边上开始慢慢的变成褐色，这样子就会最终让整个叶子慢慢干枯脱落。如果是嫩叶子不小心感染上了，就会逐渐扩大，边缘上面也开始不明显了，嫩叶子的正反两面就会生出来白色的粉斑，之后就会盖满上整个叶子。叶片也开始变成淡灰色或者是紫红色。如果是叶柄染上的话，它的节间就开始缩短，茎部也开始变细，还有些病梢上面也会出现干枯，然后覆盖满白粉。如果是花蕾染病，就会让花梗变得畸形，严重直接死掉。

防治方法：选一些抗制白粉病的品种。在冬天修剪的时候，一定要注意把那些病枝、病芽都剪去。在发病初期的时候，可以少施加一点氮肥，多增加一点磷钾肥，这样就可以提高它的抗病力。另外还要注意在下雨之后及时的排水，防止湿气长时间停留，这样就可以减少病害的发生了。

2.黑斑病

发病的话，一般都是侵害它的叶片、叶柄和嫩梢上面，叶子刚开始发病的时候，在正面就会出现一些紫褐色至褐色的小点，等扩大之后就会成为一些圆形或者不定形的黑褐色病斑。

防治方法：我们就可以选择一些多菌灵或者达克宁等一些药物，然后对它的发病地方进行喷洒就可以了。

3.炭疽病

产生的斑点一般都是在叶子边上，形状近似半圆状，斑点的边上颜色是深褐色的，到了中间会相应成褐色至浅褐色，以后就会在病斑上面生出来多数的黑色小点。这种病菌一般可以在病落叶上面过冬。在比较温暖、潮湿的环境下面，孢子萌发起来就会侵害叶片。

防治方法：可以在秋末冬初的时候进行及时的清理，把那些病落叶给收集起来，然后统一烧掉。还要加强保护，适当的给予修整。对较密集的枝叶进行处理，保持通风顺畅确保下面的枝叶接受光照。或者使用一些药物也是可以的。

专题： 蔷薇
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