Control methods of common diseases and insect pests in the latest yellow flower

Radix Rehmanniae is a widely used Chinese herbal medicine, it is rich in flavonoids, has excellent anti-cancer, and has the effect of heat-clearing and detoxification, anti-inflammation and detumescence, and can treat a variety of bronchitis, tonsillitis, pharyngitis and other inflammation. As the wild is decreasing, artificial cultivation has become a trend, but during cultivation, diseases and insect pests are important factors affecting its growth. So what are the diseases and insect pests of a yellow flower? How to prevent and cure it? Let's take a look.

1. Root rot

It is a kind of disease that harms the root system, which is easy to occur in hot and humid weather. When the disease occurs, the root system will appear watery spot, gradually turn brown and black, until rot, and the aboveground stems and leaves will slowly wither and die, causing great harm.

Prevention and treatment methods: planting in plots with good ventilation and good drainage can reduce the incidence of the disease, pull out the diseased plants and disinfect the diseased holes with lime powder, or use carbendazim or methyl topiramate to prevent and cure the disease.

2. Mosaic disease

This is a viral disease, it can increase the spread of aphids and other pests, mainly harm the leaves or flowers of the plant, when the plant disease leaves wrinkled, twisted, into a flower-leaf shape, the plant will gradually shrink.

Prevention and control methods: to prevent and cure this disease, we should first eliminate aphids to avoid spreading the disease, choose virus-free seeds when planting, or go through all aspects of disinfection before planting. No imidacloprid was encountered in the seedling stage or the peak growing season, which can prevent the disease very well.

3. Rust

This is a fungal disease, when the disease occurs, rust spots will grow on the leaves and spread gradually, and yellow powder will appear in the later stage, which is the conidium of the pathogen, which will spread with the help of the wind.

Prevention and control methods: strengthen fertilizer and water management, increase the application of phosphorus and potassium fertilizer, improve disease resistance, before transplanting and after the green period, spray triadimefon to prevent the disease.

4. Insect pests

The pests of a yellow flower include grubs, ground tigers, mole crickets and other underground pests, which will eat the roots or seedlings of the plants. if the seedlings suffer from insect pests, they are very easy to die, and the adult roots are seriously damaged, which will also lead to the withering and death of the plants.

Prevention and control methods: manual hunting can be used, or trichlorfon, dichlorvos and other chemical spraying control.

The above is an introduction to the prevention and control of common diseases and insect pests. I hope it can help you. If you want to know more about it, please pay attention to us.