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Rose got red spider how to do: more observation, timely discovery, remove the sick leaves, spray as

With the development of breeding technology, it is easier to raise flowers, and more and more flower friends choose to raise roses. If you want to ask what's the biggest headache when breeding roses, it's only red spider, because red spider is very difficult to control, and even spray does not work, making flower friends the first two. This paper summarizes some experiences from senior flower friends in controlling rose spider mite. These experiences are very valuable for flower friends.

Close up of red spider: what to do with red spider when Rose gets red spider? Sometimes friends say that it doesn't matter if they use this medicine or that medicine. In fact, if the medicine doesn't work sometimes, it's not necessarily the problem of medicine, but the reason of improper use. Drugs are usually used once every 7 days, 2-3 times in a row. But a lot of friends sprayed it today. The next day, they saw that there were still pests, so they immediately sprayed it again. In fact, you didn't strengthen the medicine and help the insects. Why do you say that? Because the current insecticides are basically low toxic, so there are few contact insecticides. Most of them are used to paralyze insects, paralyze their mouths and make them unable to eat, thus resulting in starvation. If you spray it the next day, the water will reduce the drug use. In this way, the insect will develop resistance and the drug will lose its effect. Now let's get to the point

The causes of red spider are as follows

The individual of red spider insect is very small, less than 1 mm, and its body is round or oval, orange or reddish brown. It is not easy to find because of its small size. Once it is found that it is harmful to flowers, it is often more serious. This kind of insect damages the leaves by piercing the mouthparts into the leaves and sucking the juice, so that the chlorophyll is destroyed, and the leaves appear gray yellow spots or patches, and the leaves are orange, fall off, and even light.

Red spider like high temperature and dry environment, therefore, in the high temperature and dry climate conditions, will quickly reproduce, serious damage. Most of the insects cluster on the back of the flower leaves and spin silk to form a net. In addition to crawling, wind, rain and carrying are important ways for the spread of red spider.

Red spider on the back of rose leaves

How to control red spider:

Prevention and control of spider mite damage, usually should pay attention to observation, found that abnormal color of leaves, should carefully check the back of the leaves, individual leaves injured, can remove insect leaves, more leaves occur, should be sprayed as soon as possible; leaf you see irregular chlorosis, nine times out of ten is spider mite, see the spider web when it is the outbreak period, see the white powder that has been breeding for many generations 。

Recommended medication: if you want to know the specific reason, I have time to add it. Let's just say that the drug used by red spider is special. It can't use broad-spectrum insecticide. Even if broad-spectrum insecticide has effect, it's only temporary, and red spider is prone to develop drug resistance. Therefore, it's recommended to use one drug for the first time, and another for the second time. In this way, it can be used alternately, once every 7 days, 2-3 times in a row, and once a day The plants and the soil must be sprayed, because the eggs are in the soil.

Abamectin can kill the eggs of red spider, but its effect on the adults is very poor. Therefore, all good drugs contain abamectin, and other drugs are added. The older drugs include abamectin, damanling, abamectin and propargite; New drugs recommend anerone and mite crispy from hailier; * * drugs recommend mite crispy (however, there are many fakes in China, so it's better not to buy TB, and it's recommended to buy from Bayer agents at provincial and municipal level). These are all low-toxic, and they kill eggs and insects. It's better to choose two to use alternately, and try to choose small packaging, which can't be used at home.