Disease: leaf spot

Main symptoms

The disease mainly affects the leaves of plants. At the initial stage, there will be many yellow dots on the leaf surface, which will slowly expand until they are all connected together. At this time, the leaves have almost become necrotic. At the beginning of the disease, it will almost always be at the edge or tip of the leaf. The onset time is from May to November, especially when the temperature is high and there is more rain. The disease can also be spread by rainwater to expand the hazard area

Prevention and control methods

In the plant growth stage, try to avoid the sun exposure, and try to move it indoors in the rainy season. When the temperature is high, cool it down. In the process of daily management, the application of fertilizer should be reasonable, and do not apply fertilizer blindly. When diseases are found, they can be sprayed with drugs

Insect pest: white tailed mealybug

Onset period

This pest mainly occurs in the south, especially in Shanghai. It can occur three times a year at most. The first time is in March, and the second and third times are from June to July. This pest can last until November. When the weather is cold, the pest can winter in the soil until March of the next year

Prevention and control methods

It can be sprayed with drugs in early spring to prevent the occurrence of pests in advance; When pruning plants in winter, all the leaves of diseases and pests should be cut off, and then cleaned up. At the same time, the soil can be turned over properly, taking care not to damage the roots of plants. This can reduce the probability of pests overwintering in the soil