What should I do if the copper grass is still alive after being sprayed with a flower protector?

According to the picture provided by the subject, this bug should be an aphid. We know that aphids, as a kind of piercing-sucking pests, not only have fast reproduction speed, but also have good wintering ability. As long as the temperature is about 20℃, it can spawn and reproduce quickly in the case of drought or excessive leaf density. Aphids mainly absorb juice from branches and leaves, mainly buds and flowers. What's more disgusting is that the shit sucked out can also cause other fungal diseases.

The subject said that the flower protector was sprayed and still alive. You know, aphids can also evolve to produce drug resistance, and it's not surprising that some are alive. Moreover, aphids are clustered in patches, and the effect of spraying once will not be very thorough. Flower protector is a low concentration avermectin, which has a good effect on general aphids. But if you use it for a long time, the effect may be greatly reduced. This requires our attention when using it. What are aphids killed by? Guard? Give priority to, use? Cure? Auxiliary.

First, if the residue is not much, it can be killed manually: after using the flower protector, the amount of aphids on the subject is not much. We can put on gloves, brush off the aphids left on the copper grass with a brush, or tilt the flowerpot by 45? Wash it under tap water.

Second, when there are a lot of aphids left, treat them with drugs: there are many drugs that can kill aphids in the market, such as marathon emulsion, deltamethrin emulsion, commonly used imidacloprid, etc., which have a good control effect on aphids after spraying water in proportion (generally once a week 1-2 times). If it is not environmentally friendly, it can also be sprayed with a mixed solution of washing powder, urea and water according to the ratio of 1:20:400.

3. Block the lodging of aphids and prune them properly: Considering that aphids can also plant leaves for wintering in winter, if the leaves left by aphids are not cut off in time, there may still be a sweeping trend with the increase of temperature in the next spring. We can prune copper grass properly to enhance the permeability of the whole plant and reduce the chance of recurrence.

Conclusion: Don't panic about the treatment of aphid infection with copper money grass. We can alleviate it mainly by enhancing the permeability of the whole plant, increasing illumination, keeping the soil dry, increasing ventilation and spraying chemicals.