1、 Aphid

Disease: this kind of insect mostly appears in summer. It will suck the juice in the plant, and then the plant will wither due to lack of nutrition. After being invaded by it, there will be withered spots in the leaves

1. Drug control: after aphids are found on the plants, they should be sprayed with drugs as soon as possible. Marathon emulsion, fenitrothion emulsion or imidacloprid water solvent can be used. You can also spray self-made washing powder with water, mix washing powder, urea and water, and insist on using it for 2-3 times

2. Artificial control: the damaged branches and leaves should be cut off and burned at the first time after the emergence of insects. When the plant is dormant, clean up the fallen leaves to prevent insect eggs. When the amount is small, brush it off with a soft brush

2、 Scale insects

Disease: it will harm the leaves, twigs and buds of the plant. At first, there will be yellow spots, and then it will turn yellow and wither. If there are many insects, the whole plant may die due to soot disease

Prevention and control: buy pesticides immediately when it happens. No matter how many insects there are, you can use Omethoate EC, lesbon EC and dichlorvos for about 3 times. It's best to exchange spraying drugs, which can have a good insecticidal effect