1. Powdery mildew: it is easy to be infected with powdery mildew. After being infected, some white adherents will appear on both sides of the leaves, which will cause the leaves to curl and deform, and finally make the leaves dry and fall. The best way to prevent it is to keep the light on. Timely ventilation, in the beginning can spray jiajitobuzin, Triadimefon, etc., and at the same time cut off the above sick leaf pin to destroy.
2. Verticillium wilt: this disease is mainly caused by the virus, which causes the flowers to grow in vain and turn green. During the growth period, it is necessary to increase P and K fertilizer, reduce virus infection, and disinfect with potassium permanganate.
1. Red spider: red spider will appear from March in spring. They will gather at the back of the leaf, and there will be many small white spots on the leaf, which will eventually cause the leaf to fall off. Prevention shall be done from winter, weeds around shall be removed in time, and triclosan or Omethoate shall be sprayed in case of insect damage.
2. Aphid: aphid has a rapid propagation speed, and it will gather on the back of the leaf to suck juice, causing the leaf to turn yellow and curl and shrink. Pay attention to good ventilation at ordinary times. Spray Omethoate, Yuteng essence, sulfuric acid fumigant, etc. when pests are found.
