What pesticide is good for glutenless bean leaf blight?

Glutenless bean leaf blight is caused by the appearance of water-stained spots on the edge of the leaf starting from the lower leaf when the plant is sick. And then. The leaves will turn yellow and slowly die, gradually develop to the upper leaves, and then the whole plant will die, and then the pigs will gradually crack after the follow-up.

Vascular bundles. The tissue will turn brown, the humidity area will increase, and a pink mold layer will appear.

If there is leaf blight, it is necessary to increase the application of lime to improve the soil and reduce the occurrence of diseases, and the use of pesticides can make some 50% carbendazim in the early stage of the disease.

Compare and match 1000 times the liquid or 10% 400 times the solution of the double effect aqueous agent to water every seven to ten days, if there is no carbendazim, 75% methyl tobuzine can be used.

WP is 1:1000 times the water solution, and 50 to 150 grams are watered every week. After two to three days of watering, 500 grams of dry soil is needed for sowing, which can prevent glutenless bean leaf blight.

Glutenless bean leaf blight is caused by the beginning of the appearance of lesions at the edge of or between the leaves, from large to small, irregular shape, reddish-brown to black-brown lesions. Locally wilted or dried up in one-third or one-half of the leaf, and complications.

It occurs from July to October, and carbendazim can be applied before it can be prevented because the disease will worsen due to high temperature, humidity and poor ventilation. Prevents glutenless bean leaf blight from causing root rot.

If it is the wrong medicine and burns the roots, you can use powdered foliar fertilizer of the detoxification leaf exhibition suspension fertilizer series, and fungicides if it is a bacterial fungal disease.

There is often a disease that seriously harms broad bean in the broad bean producing area, which is mainly manifested as dwarfing, tufted top and leaf death, and the masses call it "dwarf shrinkage disease", "burning branches", etc., and get this disease, the light yield is reduced, and the heavy harvest is lost. This disease is caused by the physiological potassium deficiency caused by the inability of the soil potassium supply level to meet the growth and development needs of broad beans and the imbalance of the ratio of nitrogen and potassium in the soil, which is called potassium deficiency leaf blight of broad beans. In this disease, the edges of the middle and upper leaves of the plant are yellowed at the beginning, and gradually die, showing a burning shape.

The dead part spreads and expands, and the stem gradually dies, and the whole plant dies in severe cases. There are two types of this disease. One is the "dwarf type", which generally occurs in mid, late November or early December, the plant is dwarfed, the leaves die, no potassium fertilizer is supplemented, more can not set pods, and the harvest is very small; The second is that the plant is not dwarfed, but the leaf edges are dead, and it can generally set pods, but the yield is very low.

The key to the prevention and control of "broad bean potassium deficiency leaf blight" is to apply potassium fertilizer to the soil to meet the potassium needs of broad bean growth and development, and achieve the coordination of nitrogen and potassium ratio. The amount of application, calculated as potassium sulfate, is more economical and effective to apply 10-15 kg per mu; Potassium fertilizer is applied for seed fertilizer or seedling stage.

The application effect is best in front of the three and four leaves. The method of application, such as potassium sulfate, is best applied to the roots with water. Or after planting beans, apply potassium sulfate about centimeters from the seeds; Stove ash, grass ash, farmhouse fertilizer and rice straw are potassium fertilizer resources everywhere in the countryside, in the place where chemical potassium fertilizer is lacking, it can be replaced by stove ash and grass ash, and the disease prevention effect can be more than 80% after application.

Prevention and control methods of soybean sheath blight.

Symptoms: soybean sheath blight mainly affects stems and leaves. The diseased plants are stunted, the stems and leaves turn yellow and gradually die.

The lesions on the stem are irregularly shaped and moire-shaped, brown, with inconspicuous edges, and the surface is wound with white hyphae, which gradually turns brown and has a large sclerotia of brown rice grains. The first water-stained irregular spots on the leaves, when the humidity is high, the diseased leaves seem to be scalded and die; When the weather is sunny, the lesions are brown, gradually die and fall off, and spread to the petioles and branches, and in severe cases, the whole plant dies. Gray-brown water-stained lesions are formed on the pods, white hyphae are grown, and brown sclerotia are formed, and the seeds are damaged and then decayed, resulting in a serious reduction in yield.

Control methods: selection of disease-resistant varieties; Reasonable dense planting, the planting density per mu should not exceed 12,500 plants; Implement crop rotation for more than three years; After the autumn harvest, remove the diseased plant residues left in the field in time, and bury the sclerotia and diseased plant residues scattered on the surface of the ground in the autumn ploughing land, which can reduce the source of bacteria and reduce the disease of the next year; In the early stage of the disease, spray carbendazim, jinggangmycin or 20% methyl phosphorus emulsifiable concentrate 1200 times in time.

Spray 1200 times of 20% methyl phosphorus emulsifiable concentrate.