Bacillus is a substitute for benzene non-systemic fungicides, which mainly prevent fungal infection and have therapeutic effects; they cannot be absorbed by the roots. It has good adhesion and is not easily washed away by rainwater.
Trade Names: Daknil-2787, Dakrin, Sunwat, Clayou, Dacotech, Bacillus, Dik, Dakonin, Duoqing, Keda, Shuntianxing No. 1, Mold Biqing, etc.
Chemical Name: Tetrachloroisophthalonitrile (2,4,5,6-tetrachloro-1,3-benzonitrile).
Physical and chemical properties: the pure product is a white crystal, melting point 250-251 °C, boiling point 350 °C. Vapor pressure is less than 1.3pa (40 °C). Solubility in water is 0.6 ppm, solubility at 25 °C: 0.9 mg/l water, xylene 80 g/l, cyclohexanone, dimethylformamide is 30 g/l, acetone, methanole sulfoxide 20 g/l, kerosene < 10 g/l. Thermal stability lies in the ambient temperature, stable for ultraviolet light (aqueous medium and crystal state), stable in acidic and slightly alkaline solutions, and slowly hydrolyzed at ph9.
Toxicity: rats acute oral ld50> 10000mg/kg, mice 3700mg/kg, rabbit acute percutaneous ld50 1000mg/kg, rats acute inhalation lc50> 4.7mg/l (1h). It has a strong stimulating effect on the conjunctiva and cornea of rabbit eyes, and is insensitive to human eyes. Animal tests have not seen carcinogenic, teratogenic, mutagenic effects. Rainbow trout lc500.205 mg/l, large sunfish 0.380 mg/l, carp 0.1~0.5 mg/l, catfish 0.430 mg/l. The small wild duck is 50 > 21500 mg/kg and quail 5200 mg/kg. Safe for silkworms and bees.
Main dosage forms: 40% suspension agent, 50%, 75% wettable powder, 75% water dispersible granules, 10% oil, 5%, 25% granules, 2.5%, 10%, 30%, 45% tobacco, 5% powder.
Mechanism of action: The mechanism of action is to interact with triphosphate aldehyde dehydrogenase in fungal cells, and combine with the protein containing cysteine in the enzyme, thereby destroying the activity of the enzyme, so that the metabolism of fungal cells is destroyed and loses vitality.
Features: Bacillus is a broad-spectrum, protective fungicide. Bacillus qing is mainly to prevent plants from being infected by fungi and inhibit the germination of fungal spores. After the plant has been invaded by pathogens and the germs enter the plant, the bactericidal effect is very small. It is widely used to control a variety of pests such as fruit trees, vegetables and vegetable leaves, and also has a good control effect on rice, wheat, cotton and other diseases. It is also used as an industrial mold inhibitor and fruit preservative.
Applicable crops: can be used for wheat, rice, vegetables, fruit trees, peanuts, tea and other crops.
Control objects: can control melon downy mildew, powdery mildew, anthrax, blight, tomato early blight, late blight, cucumber downy mildew, gray mold, anthrax, leaf mold and so on. It can prevent peach brown rot, scab disease, tea anthrax, tea cake disease, mesh cake disease, peanut leaf spot disease, rubber canker disease, kale downy mildew, black spot disease, grape anthrax, eggplant gray mold disease, orange scab and other fungal diseases.
Use technology
1. To prevent and control tomato leaf mold, sow seeds with 75% of the seed amount of 0.4% of the 75% bacillus clear wettable powder, and spray 75% wettable powder 600 times liquid at the beginning of the field disease. To prevent and control tomato premature blight, use 40% suspension agent 50-175 grams per mu and spray evenly on 50 kg of water.
Tomato solanum leaf mold
2. Prevention and control of cucumber downy mildew and anthrax, before or at the beginning of the disease, 75% bacillus qing wettable powder can be used 500-600 times liquid. Spray evenly. Or 30% of the tobacco clearing agent of 170 ~ 200 grams / mu lit fumigation. Further prevention and treatment depends on the development of the disease.
Cucumber anthrax
3. Prevention and control of pepper, tomato anthrax, early blight, black spot disease, before the onset of the disease or the beginning of the disease, with 75% Bacillus Qing wettable powder 500-700 times liquid, or 40% Bacillus Clear suspension agent commercial amount of 150 ~ 200 grams, add water, 50 kg, stir even spray, seedling hour spray amount of discretion. Spray once in 7-10 days, spray 2-4 times continuously.
4. For the prevention and treatment of cabbage black shin disease and downy mildew, in the early stage of the disease, use 75% wettable powder 100-150 g/mu, add 50 kg of water, stir and spray evenly. Spray once in about 7 days, 3-4 times in a row.
5. Prevention and control of yam anthrax, stone cedar stem blight, gray mold, rust, yellow cauliflower leaf spot disease, leaf blight, ginger white star disease, anthrax, etc., before the onset of the disease or the beginning of the disease, with 75% wettable powder 500-800 times liquid, 7-10 days spray 1 time, spray 2-4 times.
6, the prevention and control of lotus root rot disease, brown spot disease, black spot disease, can be used 75% wettable powder 800 times liquid spray seed lotus, stuffy seed for 24 hours, dry after planting; in the lotus flowering stage or the initial stage of the disease, mu with 75% bacillus clear wettable powder 500 grams, mix fine soil 25-30 kg, sprinkle in the shallow water layer lotus field, or 20-30 kg of water, add neutral laundry detergent 40-60 grams, spray lotus stems, spray 1 time every 3-5 days, spray 2-3 times.
7. Prevention and treatment of Cigu brown spot disease and powdery mildew, in the early stage of the disease, 75% bacillus Qing wettable powder can be used 800-1000 times liquid, 7-10 days spray once, continuous spray 2-3 times.
8. Prevention and control of taro stain disease, leaf spot disease, cress spot blight, in the early stage of the disease, with 75% bacillus Clear wettable powder 600-800 times liquid, 7-10 days spray once, spray 2-4 times. Add 0.2% neutral laundry detergent to the liquid medicine, and the effect will be better.
9. Prevent and control apple powdery mildew, rotting fruit disease, anthrax, brown spot disease, before and after apple flowering, use 75% bacillus clear wettable powder 700 times liquid. Or alternating with other fungicides. However, it is not suitable for the young fruit stage within 20 days of apple flowering.
10. To prevent and control the black shin disease of pear trees, it can only spray the base of the trunk with 500 times of 75% wettable powder before the spring rains or before irrigation. It is not possible to prevent and control other pear tree diseases with bacteriocinalis, otherwise it is easy to produce medicinal harm.
11. For the prevention and treatment of peach brown spot disease and scab disease, spray 75% wettable powder 800-1000 times liquid once during the bud stage of peach trees and when flowers are blooming, and then spray once every 14 days depending on the disease. Note that when the concentration of spraying liquid is high, it is easy to develop slight rust spots.
Grape powdery mildew
12, the prevention and control of grape white rot, anthrax, black pox disease, with 75% bacillus Clear wettable powder 500-800 times liquid, at the beginning of the discovery of disease spray the first drug, every 10-15 days sprayed once, a total of 3--5 times, or with other fungicides alternately used, can also treat downy mildew. It should be noted that some yellow varieties of grapes will have rust spots after administration, which will affect the quality of the fruit.
Strawberry gray mold
13. Control grass mold gray mold, powdery mildew, leaf spot disease, spray 75% wettable powder 500-600 times liquid once in the early, middle and final stages of grass poison flowering.
14. For the prevention and treatment of citrus anthrax, scab disease and sharpie disease, in the spring, summer, autumn shoots and young fruit stages, as well as between August and September, use 75% wettable powder 600-800 times liquid, 10-15 days spray once, spray 5-6 times, or use alternately with other fungicides.
15, the prevention and treatment of banana brown edge gray spot disease, black star disease, with 75% wettable powder 800 times liquid, starting from April, mild disease period 15-20 days spray once, severe disease period 10-12 days spray once, focus on protecting the heart leaf and the first and second young leaves, spray a total of 6-8 times a year, or alternate with other fungicides.
16. To prevent and control lychee downy mildew, the severely ill garden sprays 75% wettable powder 500-1000 times liquid once in the buds, young fruits and mature stages.
17. To prevent papaya anthrax, spray 75% wettable powder 600-800 times liquid every 10-15 days from August to September, spray 3--4 times, and focus on spraying fruits.
Precautions
1, the fungus qing on apples, pear trees, peach trees, grapes, persimmons, bayberry and other fruit trees have medicinal harm, will produce rusty fruit, plum blossoms, roses are easy to produce medicinal harm can not be used. It is easy to cause medicinal damage on peach trees mixed with borer pines, and it is easy to have medicinal damage on tea trees mixed with gram mite and tricyclic tin.
2, the toxicity of bacillus qing to fish and bees is also strong, therefore, the use of bacillus qing in paddy fields should be cautious, and should not be used before and after the flowering period of crops; it is not advisable to add oil additives when mixing liquids, and it is also necessary to be careful when mixing with emulsion preparations.