The Latest Control Methods for Common Pests and Diseases of Astragalus

Astragalus 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 artificial cultivation 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 and affect the economic returns of growers, so control measures for Astragalus pests and diseases are extremely important. Come and take a look with Qinnongwang.

1. Astragalus powdery mildew

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

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

2. Astragalus root rot

The pathogenic bacterium of root rot is Fusarium, which can survive in the soil for a long time and spread through water flow and after cultivation. It invades the plant 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 leaves of the whole plant. In the late stage of the disease, the plant's root system begins to rot, and finally the plant dies.

Control methods: 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, and disinfect the soil and seeds before planting. When diseased plants are found, promptly pull them out and carry them out of the field, 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 has extremely strong boring ability. 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 bean pods of Astragalus. After the larvae hatch, they bore into the pods and gnaw on the seeds.

Control methods: 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 brought to you by Qinnongwang. We hope they can help you. To learn more about Astragalus cultivation techniques, please stay tuned to Qinnongwang.