First, the main root of cowpea root rot and the stem below the surface are the main parts of the victim. The disease is a kind of soil-borne disease, with high temperature and high humidity prone to occur, and it is often planted with heavy rainfall in autumn and poor drainage, low-viscosity weight, and continuous cropping. Control methods: 1. Onset of heavy land plots should be carried out with onions and garlic vegetables, camphor wood crops, etc. for 3 to 4 years. 2. The cultivation of sorghum or narrow furrows is conducted. Drainage is often done to clear the ditch, and the humidity is reduced. The diseased plant residues are removed in time and burned or buried deeply. 3. Chemical control. In the field of sporadic onset of drug use, there are two methods of spraying the root and spray the drug solution, the drug can use carbendazim, anti-mildew Po WP, thiophanate-tablet, anti-humenic and so on. Irrigation of the liquid concentration can be slightly increased, each poured 250 grams of liquid, every 7 to 10 days 1 time, poured 4 to 5 times; spraying liquid according to the conventional ratio of water, spraying the base of the stem, Every 7 to 10 days, 3 consecutive sprays. Second, cowpea rust mostly occurs in the late growth stage, which mainly damages the leaves. In severe cases, stem vines, petioles and soybean pods can be damaged. The autumn and rainy years often lead to the epidemic. Long-term continuous cropping, low-lying vegetation and dense planting can aggravate the disease. Control methods: The following pesticides can be sprayed in the early stage of disease: 25% triadimefon 2000 times liquid, 5% rust ling EC 800 times, 50% carbendazim WP 500 times. Usually sprayed once every 7 to 10 days, 2 or 3 times in a row. (The use of triadimefon may be delayed by up to 15 days). 3. Cowpea mycoticosis began to occur after the true leaves of cowpea appeared. The incidence was the heaviest before harvest, and the main damage was caused by leaves. High temperature and high humidity are suitable for onset. Control methods: Avoid sowing too dense, in order to facilitate ventilation and light in the field; timely clearing of diseased leaves in the field, reduce the re-infectious bacteria source; the early onset of the use of pesticide spray, control of infection, the agent can choose chlorothalonil wettable powder (75% content 600 times solution), carbendazim (40% colloid suspension 800 times) and the like. Fourth, cowpea virus disease is heavier than autumn cowpea. At the beginning of the diseased plant, yellow-green variegated spots were formed on the leaves. Afterwards, the thick green parts gradually appeared scalloped and the leaves were deformed; the severe diseased plants had slow growth, short stature, and less flowering and scarring. The prevention and control of the disease is mainly based on the early eradication of fleas, especially in drought years, and more attention should be paid to flood prevention; in addition, cultivation and management should be strengthened to increase plant resistance to disease. Five, bean bean borers and bean beans bean borers, also known as cardamom, is the main pest of cowpea. It takes 4 to 5 generations every year. In addition to the prevention and control of the timely removal of flowering and falling crops in the field, removal of the wounded leaves and concentrated burning of soybean meal, the main use of chemical control. The strategy for chemical control is to “treat flowers without treatmentâ€, that is, the first dose of cowpea in the initial flowering period, and the interval between 7 and 10 days, 2 or 3 consecutive times. The spraying time is better when the petal is opened before 8 o'clock in the morning. At this time, the parasites can fully contact the liquid; the pesticides can be used in the form of pyrethroids and their compound preparations, such as the enemy killing, rapid extinguishment, killing, etc. If medication is applied after harvesting, it must be sprayed after picking, prohibiting pre-harvest spraying and avoiding poisoning. Soybean meal threatens soybeans and also harms cowpeas. It is often associated with cowpea borers. This worm also eats pods from larvae, drills beans, and the pods are filled with insect waste, resulting in pods and rot. Prevention and treatment of borers can be treated concurrently. Yirun Agricultural Cooperative , https://www.yiruncn.com