20% Rung fungus suspension
Longke by the Longwan Institute of Pesticides in Wenzhou City, Zhejiang Province, Longwan Chemical Co., Ltd. newly developed a highly efficient, low toxicity, safe thiazole organic copper fungicide. It is the first domestic and international invention patented product. Through more than 600,000 mu of rice, bacterial blight, bacterial leaf blight, and two major diseases on the citrus: ulcer disease, scab disease prevention and control demonstration, its control effect is remarkable, better than common pesticides and various copper preparations. . The brief introduction is as follows:
First, name and traits:
Common name: Thiobacillus copper, English common name: thiodiazole-copper, trade name: Longkei, molecular formula: C4H4N6S4Cu. Main physicochemical traits: The original drug is a yellow-green powder crystal, with a specific gravity of 1.94, a melting point of 300°C, and a slight solubility in dimethylformamide. It is insoluble in water and various organic solvents. The formulation product is a yellow-green viscous liquid, with a specific gravity of 1.16-1.20, a fineness of 4-8um, a PH value of 5.5-8.5, a suspension rate of more than 90%, a stable storage under 542°C and below 0°C, and a strong alkaline decomposition. , stable under acidic conditions.
Second, characteristics:
Efficient and broad spectrum: Special effects on bacterial diseases and high efficiency on fungal diseases.
Internal absorption of low toxicity: good suction; is a low-toxic pesticide.
Ultra-high suspension: ultrafine particles, high suspension rate.
Protection and treatment: good protection and treatment.
Safe to use: It is safe for crops, fish, birds, bees, silkworms, humans and animals, and beneficial organisms, and has no pollution to the environment.
Unique mechanism: Sterilization mechanism, both the unique control effect of thiazole groups on bacteria, and the excellent control of copper ions on fungi and bacteria.
Third, toxicity:
1, acute toxicity: the original drug on the rat oral acute toxicity LD50 2150mg/kg. The acute LD50 of 20% formulation in rats was greater than 5050 mg/kg. Acute drug-induced dermal LD50 in the male and female rats was greater than 2000 mg/kg. The acute LD50 of 20% formulation in rats was greater than 2150 mg/kg.
2. The original drug had no induced germ cell mutation at each test dose.
3. In the Ames test, the mutagenicity of the Longicillin drug was negative.
4. The original drug did not cause micronucleus at the dosage used in the experiment.
5. The maximum non-effect dose of subchronic oral toxicity was 20.16 mg/kg-day.
6. The original drug is non-irritating to the skin and mildly irritating to the eye.
7. The preparation is mildly irritating to the skin and eyes.
8.20% ronactosus suspension is a weak sensitizer to the skin.
Fourth, the mechanism of action
The structure of Rungella is sterilized by two groups. The first is the thiazole group, which has no inhibitory effect on bacteria outside the plant, but it is a highly effective therapeutic agent in plants. The agent is severely damaged in the pore conduit of the plant, and the cell wall becomes thin and then disintegrates, leading to the death of the bacteria. . Some of the bacteria in the other two kinds of catheters (threaded catheters and looped catheters) were affected by the drug. The bacteria did not divide and the condition was temporarily suppressed. However, the bacteria did not die. After about 10 days, the residual period of the drug was In the past, the bacteria re-bred and the disease started to develop again. The second is copper ions, which have both fungicidal and bactericidal effects. The copper ions in the agent exchange with the cations (H+, K+, etc.) on the surface of the pathogen's cell membrane, causing the protein on the cell membrane of the pathogen to coagulate and kill pathogens; some of the copper ions penetrate into the pathogen cells, and bind to certain enzymes and affect their activity. As a result of dysfunction, germs fail and die. In short, under the joint action of the two groups, the bacteria are more thorough, the control effect is better, and the control objects are more extensive.
Fifth, the role of performance:
Roncobacter has good systemic absorption and good protection and therapeutic effects. The effect of therapeutic effect is greater than that of protection. After determination of the efficacy of endurance, 20% of the bronchobacillus SC in the usual dosage, the residual effect of up to 10-12 days.
Sixth, the main control objects:
The thiazole organic copper bactericide of the genus Longkei has specific effects on the prevention and treatment of bacterial diseases, and has high efficiency in the prevention and treatment of fungal diseases, and can be widely used for the prevention and control of more than 60 kinds of bacteria and fungal diseases in more than 20 kinds of crops.