Control methods of common diseases and insect pests in Radix Astragali

Astragalus membranaceus has a strong effect of tonifying qi and strengthening spleen and stomach, and meets the needs of the human body. It is an important Chinese herbal medicine. With the continuous growth of market demand, its artificial planting area is also increasing. But at the same time, the incidence of diseases and insect pests is also increasing year by year. These diseases and insect pests seriously affect the planting and yield of Radix Astragali, affecting the economic benefits of growers, so the prevention and control measures of plant diseases and insect pests are very important. Let's take a look at the pro-agricultural network.

1. Powdery mildew of Radix Astragali

Powdery mildew is mainly caused by pathogens overwintering in the disease residue behind the soil, and begins to reproduce and infect when the climate is suitable in the coming year, which mainly harms the leaves and petioles of Astragalus membranaceus, and sometimes harms pods. When the disease occurs, the leaves appear white powder, and with the development of the disease, a round powdery gray-white mildew layer is formed. when the disease is serious, the leaves are yellowish brown and dry, resulting in deciduous leaves, petiole and stem infected at the same time, and finally lead to plant death.

Control methods: clean up the field, remove the disease and residues out of the field in time, reduce pathogens, strengthen management, reasonably close planting, disinfect the soil and seeds during sowing, and spray with 50% carbendazim WP 500 times 800 times in case of disease, once a week, two or three times in a row.

2. Root rot of Astragalus membranaceus

The pathogen of root rot is Fusarium, which can survive for a long time in the soil, spread through water flow and farming offspring, and invade plants through root wounds. The growth point of the plant withered during the disease, and with the development of the disease, the wilt gradually turned into the withering and shedding of the leaves of the whole plant. In the later stage of the disease, the root system of the plant began to rot and finally died.

Control methods: because the pathogen survives and propagates in the soil, sandy soil with good permeability should be selected for planting, reasonable rotation, disinfection of soil and seeds should be carried out before planting, disinfection of diseased plants should be carried out in time, and then 50% carbendazim WP 800,900 times solution should be used to irrigate the disease hole.

3. Pod borer

Bean pod borer is distributed all over the country and is a pest of many kinds of crops. the larvae often endanger the pods and often eat the seeds, which are full of feces, causing mildew and rot. The old worm overwintered by cocooning in the soil, broke out after overwintering, and laid eggs on the pods of Astragalus membranaceus. After hatching, the larvae got into the pods and ate the seeds.

Control methods: reasonable rotation, avoid continuous cropping or intercropping with legume crops, apply Beauveria bassiana powder in the soil in winter, remove old insects and cocoons, remove weeds and loosen the soil in time, and use insecticides to control the larvae during hatching.

The above are the prevention and control methods of common diseases and insect pests of Astragalus brought by pro-agricultural network. I hope I can help you. If you want to know more about Astragalus planting technology, please pay attention to the pro-agricultural network.