First, cowpea root rot: The main roots of plants 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. Plots with severe disease should be carried out for 3-4 years with onions and garlic vegetables and camphor trees. 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 pouring liquid 250 grams, every 7-10 days 1 time, poured 4-5 times; spraying the liquid according to the conventional ratio of water, spraying the base of the stem, Spray it three times in a row every 7-10 days.
Second, cowpea rust: mostly occurred in the late growth period, mainly damage the leaves, stem vines, petiole, bean pods can be seriously injured. 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 can be used in the early stages of the disease by selecting the following sprays: 25% Triadimefon 2000 times liquid, 5% Versatrol EC 800 times, and 50% Carbendazim 500 times wettable powder. Spraying is usually done 7-10 days in a row, 2-3 times in succession (delayed to 15 days with triadimefon medication).
Third, cowpea mycoplasma disease: Since the emergence of true leaves of cowpea began to occur, the incidence of disease before harvest is the heaviest, the main damage leaves, causing leaves. High temperature and high humidity are suitable for onset, and hot rain is more serious.
Control to avoid sowing too dense, in order to facilitate ventilation and light fields; timely removal of diseased leaves in the field, reduce the re-infection of bacteria; early stage of the use of pesticide spray, control of infection, the agent can use chlorothalonil wettable powder (75% content 600 times liquid), carbendazim (40% gel suspension 800 times) and so on.
Fourth, cowpea virus disease: the incidence of autumn cowpea heavier. 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.
Fifth, kidney bean borers and pods: Bean bean borers, also known as pods, are the main pests of cowpea. 4-5 generations occur 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 of chemical control is to "treat flowers without treatment", that is, the first application of cowpea in the initial flowering period, after 7-10 days interval, 2-3 times in a row. 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.
Shilu Huanglian is mainly produced in the primeval forest area of Dafengpu, Huangshui National Forest Park, Huangshui Town, Shizhu County. The unique climate, water quality and soil conditions in this area are the best growth areas for Shiluo Huanglian. In 1991, the Ministry of Agriculture Investment in the establishment of the National Yellow River Huangpi GAP demonstration base, the town has also established China's largest Coptis market. Natural plant Raw materials Agricultural products are not any additives. Traditional Huanglian kang, baking with firewood, drying, hair removal with bamboo cage trough, the species are hand-selected, remove the impurities and minced, relatively clean.
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