What are the disease control methods in mung bean cultivation?
How do you control diseases when growing mung beans? Please give an introduction. The following introduces three common mung bean diseases for reference: 1. Viral disease (1) Symptoms This disease occurs very commonly, with more cases at the seedling stage. In the field it mainly appears as mosaic mottling, crinkled mosaic, and so on. When the disease is mild, plants show mosaic and mottling symptoms at the seedling stage...
How do you control diseases when growing mung beans? Please give an introduction
The following introduces three common mung bean diseases for reference:
1. Viral disease
(1) Symptoms
This disease occurs very commonly, with more cases at the seedling stage. In the field it mainly appears as mosaic mottling, crinkled mosaic, and so on. When the disease is mild, plants show mosaic and mottling symptoms at the seedling stage. When the disease is severe, seedlings develop crinkled, small-leaved, bushy mosaic plants, with deformed, crinkled leaves and raised leaf mesophyll forming blister-like spots, showing obvious crinkled mosaic with alternating yellow and green.
(2) Conditions for onset
1. Sowing diseased seeds causes direct onset of the disease.
2. A large number of aphids in the mung bean field leads to severe disease.
3. Wind and rain add to the weather, causing friction between plants and worsening transmission.
(3) Control methods
1. Select disease-free or disease-tolerant varieties, and control aphids.
2. At the early stage of the disease, choose 20% Bingdubi or 20% Bingdu A 500-fold solution for spray control, spraying once every 7-10 days, generally 2-3 sprays.
2. Leaf spot disease
When mung beans develop the disease, water-soaked small spots first appear on the leaves, then expand into round or irregular brown blighted spots, and later become large necrotic spots, causing drying or leaf drop.
The occurrence of this disease is closely related to temperature and humidity. Under conditions of 85%-90% relative humidity and a temperature of 25-28°C, the pathogen's conidia germinate fastest; when the temperature reaches 32°C, the mycelium grows most vigorously and the disease develops fastest. In our city, the disease is generally more severe during the mung bean flowering stage and after rain at high temperatures.
1. Select disease-resistant varieties, plant at a reasonable density, and ensure good ventilation in the field.
2. Strengthen field management, and pay attention to draining or dispersing soil moisture after heavy rain.
3. At the early stage of the disease, choose 70% mancozeb 500-fold solution, or 41% Texiao Shajun Wang 2000-fold solution, or 20% Landi 500-fold solution for spray control. Spray once every 7-10 days, for 2-3 consecutive sprays, which can effectively control the disease epidemic.
3. Root rot
At the early stage of the disease, the heart leaves turn yellow. If the root system is pulled out and observed, the lower part of the stem and the upper part of the main root can be seen to be dark brown and slightly sunken. When the stem is cut open, the vascular bundles have turned dark brown. When most of the root has rotted, the plant wilts and dies.
(2) Control methods
1. Choose disease-resistant varieties, and carry out crop rotation with non-legume crops for more than 3 years.
2. Cultivate in time, drain after rain, and raise the ground temperature.
3. At the early stage of the disease, choose 75% chlorothalonil 600-fold solution, or 15% Fulingling 600-fold solution, or 70% thiophanate-methyl 1000-fold solution for spraying, spraying once every 7-10 days, for 2-3 consecutive sprays. If the above chemicals are used for irrigation, the effect is even better.
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