Control methods of diseases and insect pests in Coptis chinensis

Coptis chinensis is a plant of the genus Coptis of Ranunculaceae. Its rhizome can be used as medicine after drying. It has the effect of clearing heat, dryness and dampness, purging fire and detoxification, and has a wide range of antibacterial effects. Due to the scarcity of wild resources, most of them are cultivated artificially, but in artificial cultivation, diseases and insect pests will bring huge economic losses to farmers. Let's take a look at the prevention and control methods of Coptis chinensis diseases and insect pests.

1. Powdery mildew

Also known as wax gourd powder, mainly harms the leaves of Coptis chinensis, when the disease occurs, the back of the leaves appear round or oval brown spots, gradually expand or merge, forming large disease spots. The disease spot gradually grows into white powder, and small black particles appear at high temperature from July to August, which can cause plant death and scorch.

Control methods: reasonable close planting, adjust the ventilation and light transmittance between plants, clear the garden completely in winter, burn or bury the dead branches and leaves centrally or deeply, and spray stone-sulfur mixture every other week for 2-3 times.

2. White silk disease

White silk disease mainly occurs in summer and autumn, mainly harms the rhizome, and there is no obvious change in the aboveground part at the initial stage of the disease. in the later stage of the disease, with the increase of temperature, the pathogen extends upward and spreads densely in the soil surface of the rhizome. A tea-brown sclerotia is formed in the root neck, which affects the nutrient transport of the plant, resulting in the top tip beginning to wither and die.

Control methods: the planting method of rotation is adopted, which can be rotated with Gramineae plants, but not with Radix scrophulariae and Paeonia lactiflora and other medicinal materials. When the disease occurs, it can be irrigated with lime water or sprayed with bacilli, and the disinfected plants should be pulled out and taken out of the field in time. And disinfect the disease points.

3. Root rot

Generally, the disease begins from April to May, and the peak period is from July to August. It is known by its name that it is a disease that harms the root system. When the disease occurs, the fibrous root of the plant begins to turn dark brown and slowly rot and dry up until it falls off. And the aboveground part will also have symptoms, the leaves appear fuchsia irregular disease spots, gradually become dark purplish red.

Control methods: when planting, we should pay attention to the underground pests, reduce the incidence of disease, remove the diseased plants in time when the disease occurs, and apply lime powder disinfection in the disease points to avoid the spread of the disease.

4. Anthrax

Generally, the disease begins at the beginning of May, and in the peak period in June, the leaves appear striped purple spots, which can merge with each other, and finally lead to the dry and death of the leaves.

Prevention and treatment: in the early stage of the disease, Bordeaux solution or mancozeb can be used to spray, the effect is better.

The above is the introduction of pest control methods of Coptis chinensis, hope to help you, want to know more related knowledge, please pay attention to us.