Identification and Prevention of Main Diseases of Kidney Bean

First, the roots of the root rot plants and the stems of the ground began to appear red-brown lesions, the edge is not obvious, gradually turned dark brown to dark brown, slightly sunken or cracking. After flowering and scabbing, the leaves gradually turn yellow and wither from the bottom upwards, and generally the leaves do not fall off. The main root of the diseased plant was rotted after being damaged, no lateral roots were produced, the plants were short, and severe stems and leaves withered and died. Control methods: 1 It is advisable to implement 2-3 year rotation with onions, garlic or cabbage vegetables and grass crops; 2 to strengthen the cultivation and management. Implement high-row cultivation or narrow-narrow ravine cultivation; clear water in time to remove waterlogging, reduce field humidity and groundwater level, promote root development; remove diseased plant debris in time, reduce bacteria source; 3 implement chemical control. The medication started when there was a sporadic illness in the field. The application method is to irrigate or sprinkling the base of the stem, once in 7-10 days, and 3-4 times for continuous administration. Irrigate each time 250 ml of liquid per strain. Pharmaceutics are: 70% thiophanate-methyl wettable powder 1000 times, 50% carbendazim wettable powder 400 times, 75% chlorothalonil wettable powder 600 times, 70% dexamethasone powder 1500 times, 20% Ammonia Bronze Aqueous Solution 400 times.
Second, rust mainly damages leaves, petioles, stems and pods can also be affected. At the beginning of the disease, yellow and white spots were formed on the back of the leaves, and they slightly raised and formed a reddish-brown freckle after enlargement. They had yellow halos. After the freckle ruptured, reddish-brown powder was scattered, and the leaves at the spots were in front, resulting in chlorotic spots. At the late stage of plant growth, the diseased part produces black freckle and contains black powder. Control methods: 1 selection of disease-resistant varieties, the implementation of rotation cultivation; 2 strengthen the cultivation and management. Adjust the sowing time so that the harvest will avoid the rainy season, drain the drains, prevent damage, and clean the fields after harvest. 3 Implement chemical control. In the early stage of disease, 25% triadimefon was sprayed in 2000 times. 15 days or so spray protection 1, even spray 2-3 times, or with 50% rust rust EC 800 times, 50% Duolin WP 500 times spray, 7-10 days 1, even spray 2-3 times.
Third, the main damage to mycoplasma leaves, stems and pods can also be affected. Initially, purple spots were produced on both sides of the leaves, and they later expanded into light brown and near-circular lesions. The surface had dense layers of coal-like mold and the backs of leaves were more than the front. In severe cases, the diseased leaves are dry and fall early. The last plant leaves only a few young leaves at the top. Control methods: 1 Strengthen cultivation and management, reasonably close planting, ensure good ventilation and light transmission in the field, rational fertilization, pay attention to the application of organic fertilizer, increase phosphorus and potassium fertilizer and trace fertilizer, increase the resistance to plant disease, remove diseased leaves in time, and reduce The source of bacteria; 2 timely application of pesticide control, spraying pesticide control immediately at the beginning of the disease. About 10 days, spray 2-3 times. The agent can be used 70% thiophanate-methyl wettable powder 1000 times, 75% chlorothalonil wettable powder 600 times, 40% chlorhexidine suspension 800 times, 40% dry WP 1000 times liquid.

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The bridge was subdued.

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