Agricultural streptomycin
The commonly used agricultural streptomycin contains 72% streptomycin sulfate. The first is medical, the pure product is white amorphous powder, soluble in water, low toxicity to humans and animals, and the content is 1 million units. Agriculture is primarily used to control bacterial diseases. Control cucumber leaf spot, use concentration of mg / l -250mg / l, that is, 1 million units of streptomycin sulfate 4000 times - 5000 times control cabbage soft rot with 150mg / l -200mg / l, that is, 1 million units of pure The powder is sprayed with 5000 times to 6000 times.
Agricultural streptomycin-based antibiotic fungicides have good control effects on eubacterial diseases of various crops. Agricultural streptomycin generally refers to 72% of streptomycin sulfate preparations directly used in crops on the market. It is prepared by using sulfuric acid or the like as a reactant or a filler and streptomycin. Therefore, agricultural streptomycin refers to a preparation. Agricultural streptomycin sulfate refers to a preparation which can be directly applied to crops.
Control objects and methods of use Agricultural streptomycin has a systemic action, which can control a variety of plant bacteria and fungal diseases. Mainly used for spraying, see for root irrigation and soaking and disinfection.
(1) Prevention and control of Chinese cabbage soft rot, Chinese cabbage cabbage black rot, cucumber bacterial angular leaf spot, sweet pepper scab, soft rot, bean bacterial bacterial disease, fire disease, sprayed with 200ppm agricultural streptomycin solution At the beginning of the onset, spray once every 7-10 days, even spray 2-3 times.
(2) Control tomato, sweet (spicy) pepper bacterial wilt. 100-150ppm agricultural streptomycin solution was used to irrigate the roots at the beginning of the disease. Each plant was filled with 0.25 kg, and once every 6-8 days, it was irrigated twice.
(3) Control tomato tomato ulcer disease, according to 1 agricultural streptomycin plus water 15 liters, 150 ml of water per plant when transplanting.
(4) Prevention of bacterial bacterial angular leaf spot of cucumber, soaking seeds with agricultural streptomycin at 220 ppm for 30 minutes, and taking out germination after sowing.
Streptomycin sulfate
Agricultural streptomycin sulfate is a highly effective, low toxicity, low residue, pollution-free, environmentally compatible antibiotic pesticide , which has both therapeutic and protective effects. It is a systemic and environmentally friendly fungicide. It has the advantages of wide antibacterial spectrum, strong selectivity and easy to be absorbed by crops, especially for bacterial diseases. It is widely used in wildfire, bacterial wilt, angular blight, soft on tobacco, vegetables, fruit trees, grain and other crops. Rot, ulcer disease, bacterial blight, anthracnose and other diseases are currently an ideal agent for the prevention and treatment of bacterial diseases.
A quality qualified streptomycin soluble powder should have the following characteristics:
1. Appearance: white powder, no granular matter, easy to absorb moisture, sticky with hand rub;
2, the product is all soluble in water, the aqueous solution is colorless and transparent, no suspended matter, no precipitation;
A 3.1% aqueous solution was pH 4.5-7.0, and a barium chloride solution was added to produce a white precipitate.
Physical and chemical properties: The soluble powder is white or off-white powder, odorless and slightly bitter. Soluble in water, insoluble in ethanol, chloroform or ether. It is hygroscopic and should be stored in a dry place. Stable under air and light, the aqueous solution is also stable, and can remain unchanged for 2-3 weeks at room temperature. Effervescent tablets are circular tablets with a uniform color of 25mm. They are easy to absorb moisture and quickly disintegrate in water. It takes 3-5 minutes to completely disintegrate. It should be stored in the sun and dry place.
Safety: The acute oral LD50 of effervescent tablets in male and female rats is greater than 4640mg/kg, and the acute percutaneous LD50 (4h) in male and female rats is greater than 2150mg/kg, which is not irritating to rabbit skin and eyes.
Usage: Prevention is the main method. After the crops are fixed, the medicine is started. The medicine is used once every 7-10 days, and the medicine is used 2-3 times. The dosage and the number of medications can be adjusted according to the growth period of the crop and the severity of the disease.
In short, based on my pesticide experience, in a word, streptomycin sulfate is a substitute for agricultural streptomycin.
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