Do You Know Thiram?

Thiram, molecular formula C6H12N2S4, molecular weight 240.44, other names are Tyuram, Saiosan, Aresan, is a low toxicity fungicide, irritating to skin and mucous membrane. It can treat epidemic and other bacterial infections and is widely used as a plant fungicide and accelerator in the rubber industry. Thiram is the trade name, its chemical name is tetramethylthiuram disulfide. Its CAS number is 137-26-8. Flash point is higher than 300℃. Thiram is a protective fungicide, broad-spectrum protective fungicide of the Thiram system, applicable to a variety of crops downy mildew, epidemic disease, anthracnose, black cereal spike disease, seedling yellow blight has a better control.

Applications

Use as seed treatment, soil treatment or spray. At dose 0.125% (active ingredient) seed dressing to control seedling blight and sudden blight of kale, lettuce, melon, eggplant and broad bean; at dose 0.15~0.25% (active ingredient) seed dressing to control rice seedling blight, black fungus of cereals and pine seedling blight; at dose 0.4% (active ingredient) seed dressing to control blight of peas, etc. It can be used to treat soil with 3750~5625g of active ingredient per hectare (ditch or hole application) to control vegetable, tobacco and sugar beet seedling diseases, and to control gray mold of strawberry, black star disease of pear, late blight of potato and tomato, downy mildew of melon and vegetable, anthracnose of grapes and white rot by spraying 50% fomesin wettable powder with 500~800 times of water. Commodity has a variety of compounding preparations production, such as with chlormequat chloride, with thiophanate-methyl, three fomes (40% fomesan, 20% fomesan, 20% fomesan arsine), (1.2% fomesan, 0.6% fomesan, 0.6% fomesan), etc.. The compound seed dressing has been commercialized in China, which is a good seed dressing instead of mercury formulation. 40% seed dressing wettable powder contains 20% fomesin and 20% seed dressing. The seed dressing is a systemic fungicide. Its properties: pure product is white powder, melting point 222~224℃, decomposition temperature is 270~285℃. Insoluble in water, small solubility in general organic solvents, easily soluble in dimethylformamide. Generate salt with acid, more stable to alkali. Each 100 kg of seeds with seed dressing double active ingredient 40 ~ 80 grams of seed dressing to control wheat black spike disease; with active ingredient 120 ~ 200 grams of seed dressing to control sorghum black spike disease; with active ingredient 200 grams of seed dressing to control cotton seedling disease with 2500 mg / l liquid seed dressing to control red hemp anthracnose.