How do roses and roses raised on the balcony kill pests? What kind of pest is this? Let the leaves wither in a few days.

It belongs to aphids. Generally, it is easy to happen when the weather gets warmer in spring and autumn, and it is mostly clustered on tender branches and leaves. Needle-shaped mouthparts pierce the pulp of stems and leaves to absorb juice. After the damaged parts of plants are damaged, they grow slowly and their leaves curl.

Prevention and treatment methods: ① a few can be brushed off with a brush, and be careful when brushing to avoid damaging young leaves; ② Washing powder 5 ~ 10g, diluted with 5kg water and sprayed 1 ~ 2 times (every week 1 time) can kill all of them. This method is simple and safe, and can be used to control pests. If the pest is serious, dimethoate or dichlorvos emulsion 1500 ~ 2000 times can be sprayed.