What are the common pest and disease control methods for Astragalus membranaceus?

Astragalus membranaceus has the powerful effect of tonifying qi and strengthening the spleen and stomach, and contains trace elements needed by the human body. It is an important Chinese herbal medicine. As market demand continues to grow, its artificially cultivated area is also constantly increasing, but at the same time the incidence of its pests and diseases is also rising year by year. These pests and diseases seriously affect the cultivation and yield of Astragalus membranaceus and affect the economic returns of growers, so pest and disease control measures for cultivating Astragalus membranaceus are extremely important. Take a look with Qinnongwang.

1. Astragalus membranaceus powdery mildew

Powdery mildew mainly overwinters as pathogens in diseased plant residues in the soil, and begins to reproduce and infect when the climate is suitable the following year. It mainly harms the leaves and petioles of Astragalus membranaceus, and sometimes also harms the pods. When the disease occurs, white powder appears on the leaves. As the disease develops, round powdery gray-white mold layers form. When the disease is severe, the leaves turn yellow-brown and dry up, causing defoliation, and it also causes the petioles and stems to become infected at the same time, ultimately leading to plant death.

Control method: Clean the field, promptly remove diseased plant residues and carry them out of the field to reduce pathogens, strengthen management, plant at a reasonable density, disinfect the soil and seeds at sowing time, and when the disease occurs, spray with 50% carbendazim WP 500-800 times dilution for control, spraying once every week, two or three times in succession is enough.

2. Astragalus membranaceus root rot

The pathogenic bacterium of root rot is Fusarium, which can survive in the soil for a long time, spread by water flow and farming tools, and invade plants through parts such as root wounds. When the disease occurs, the plant's growing point wilts. As the disease develops, this wilting gradually becomes wilting and shedding of the whole plant's leaves. In the later stage of the disease, the plant's root system begins to rot, and finally the plant dies.

Control method: Because the pathogen survives and reproduces in the soil, when selecting soil for planting, choose sandy soil with good permeability, carry out reasonable crop rotation, disinfect the soil and seeds before planting, promptly pull out diseased plants and carry them out of the field when found, then irrigate the diseased holes with 50% carbendazim WP 800-900 times dilution for control.

3. Bean pod borer

The bean pod borer is distributed throughout the country and is a pest of many crops. It is extremely boring. The larvae often harm bean pods, often eating the seeds into notches, filling the pods with frass, and causing mold and rot. The old larvae spin cocoons in the soil to overwinter. After overwintering, they break out of the cocoons and lay eggs on the pods of Astragalus membranaceus. After the larvae hatch, they bore into the pods and gnaw on the seeds.

Control method: Carry out reasonable crop rotation, avoid continuous cropping or intercropping with leguminous crops, apply Beauveria bassiana powder to the soil in winter to eliminate old larvae and cocoons, weed and loosen the soil in time, and spray insecticide for control during the larval hatching period.

The above are the common pest and disease control methods for Astragalus membranaceus brought to you by Qinnongwang. We hope they can help you. To learn more about Astragalus membranaceus cultivation techniques, please stay tuned to Qinnongwang.