This disease mainly damages leaves, even petioles and pods in severe cases. The pathogens are Basidiomycotina and Puccinia pedunculata. At the beginning of the disease, the leaves faded little by little, and yellow spots appeared, and the spots gradually increased until the whole leaves were densely covered. Some yellow-brown spots appeared on the corresponding back of the hospital bed, and the reddish-brown powder dispersed after the epidermis broke. Leaves turn yellow, plants are short, there are few pods, the growth period is short, and finally they wither and die. Pods may be infected with germs throughout the growth period. From beginning to end, weaken resistance, improve influence and reduce the source of infection.

On the basis of strengthening soil and fertilizer management, comprehensive preventive measures of spraying prevention and control should be supplemented in time. All employees are innocent. After the harvest, we should eliminate the ills in the fields and concentrate on burning. Choose all crops to plant gramineous fields. Don't choose all crops as fields for planting soybeans or peanuts. Select disease-resistant varieties. Take drugs in time for prevention and treatment at the initial stage of the disease. The medicament can be 50% sulfur suspension concentrate 150 times, 75% methylprednisolone wet powder 1000 times, 50% carbendazim wet powder 800- 1000 times, or 20% powdery rust cream 800- 1000 times. Once every 8- 10 days, 2-3 times in a row.

It mainly harms stems, leaves and pods. It mainly occurs near stems or nodes, especially near the ground. At first, the patient was waterlogged, the wet rot around the stem contracted, and the patient withered and died. High humidity, cortex rot, white mold on the surface. Bain's dye bottle was dark green at first, and then expanded into round light brown spots with white mold on the surface. The man with pod disease has gone moldy and rotten. Selection of disease-resistant varieties. Implement crop rotation. Pay attention to choose standard soil with good drainage for planting, and use high ditch for reasonable close planting to ensure ventilation and timely drainage after rain. Drug prevention and treatment, spraying drug protection in time at the initial stage of the disease, spraying 58% domir zinc soluble powder 500-800 times, or 64% vaccine wetting agent 500 times, or 72.2% plum 800 times every 7- 10 day.

Soybean hornbill disease, also known as leaf mold, is a fungal disease. Diseases mainly harm leaves. At the initial stage of the disease, there are nearly round yellow room green spots. When the humidity increases, a dark brown fungus layer similar to soot will grow on the back, which can take care of coal mold. When the disease is serious, defoliation will occur, which has a great influence on the yield and quality of soybean. The temperature is relatively high, and with the pouring of a lot of rain, it is in a high temperature and high humidity environment. In this climate, Congo coal germs are easy to occur on a large scale. Today, this article tells you the occurrence conditions and control methods of soybean coal mold, hoping to help the cultivation and management of soybean.