Yesterday early in the morning, I received a photo of the azalea sent by a flower friend, and the leaves of the rhododendron are covered with white spots, and many of the leaves appear in pieces, which at first glance are very similar to the symptoms of the red spider.
Probably many of our flower friends have encountered this situation, today the blue demon will talk about a common insect pest of azaleas - military insects.
Meet the Cuckoo Army Companion Worm
The military insect is an insect of the genus Reticulate in the family Reticulate, so you can simply understand that the Military Bug is a reticulated bug. Adults and nymphs of military insects will gather in groups on the back of rhododendron leaves and suck the sap of rhododendron leaves, which is very similar to the red spider, so military insects will cause great damage to the rhododendron leaves, resulting in insufficient photosynthesis of rhododendron leaves, and gradually fall off.
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Moreover, after the military insect destroys the leaves of the rhododendron, it will also make the rhododendron susceptible to bituminous coal disease, and the lesions such as coal spots will appear, and the harm to the azaleas is still very large.
The difference between the Cuckoo Army Companion Worm and the Red Spider
Because the military insect is also sucking sap on the back of the leaf, causing many spots on the leaves of the rhododendron, the symptoms are very similar to the symptoms of the red spider, and it is necessary to pay attention here to distinguish it from the red spider.
The easiest way to do this is to turn over the rhododendron leaves directly and observe the back of the rhododendron leaves.
If it is a red spider, there will be obvious red and white particles on the leaves, very, very small particles, and pinhole-sized spots on the leaves.
The military insect is different, usually we can clearly see the military insect on the back of the rhododendron leaf, the military insect is much larger than the red spider, it is easy to see. There will also be obvious brown scars or coal spots on the leaves, as well as excrement from military insects.
It is still better to distinguish between red spiders and military insects by looking at the back of the leaf. The destructive power of the military insect is very strong, but the governance is relatively simple.
Military insect treatment
In the daily management of rhododendrons, it is necessary to pay attention to maintaining a well-ventilated environment, in April-May of each year, it is the activity time of overwintering adult insects, pay attention to observation, and take timely measures when military insects are found to gather leaves.
Drug therapy can be sprayed with octylthion, high-efficiency permethrin, etc., which can effectively kill military insects.
This article is the original sharing of the Blue Demon Garden. In my public name: Blue Demon Garden (ilanyao), a collection of thousands of flower raising experience articles are collected to help you less flower pits!