Onion purple spot disease comprehensive prevention

1 Rotation: 2 years or more rotation. 2 Use disease-free seeds: Select seeds from fields that are free of disease or lighter disease. 3 Seed Disinfection: Seeds can be soaked with 40% formaldehyde 300 times for 3 hours for disinfection. Bulbs can be sterilized with warm water at 40 to 45 degrees Celsius for 90 minutes. 4 Field Management: Choose loam soil with flat terrain and convenient drainage, and apply adequate phosphorus and potash fertilizers and control irrigation on the basis of applying sufficient organic fertilizers as base fertilizer to enhance crop resistance. 5 Clean pastoral: Regularly check the development of diseases, remove the diseased plants or remove old leaves, diseased leaves, and diseased pedicels in time, and deeply bury or burn them. After harvest, remove the diseased body and deep-seed.

Imported Premium Fire Retardant

Flame retardants, functional auxiliaries endowed with inflammable polymer flammability, mainly designed for flame retardancy of polymer materials; There are many types of flame retardants, which can be divided into additive flame retardants and reactive flame retardants according to their usage.

The additive type flame retardant is added to the polymer by mechanical mixing method to make the polymer flame retardant. At present, the additive type flame retardant mainly includes organic flame retardant and inorganic flame retardant, halogenated flame retardant (organic chloride and organic bromide) and non-halogenated flame retardant. Organics are some flame retardants represented by bromine, phosphorus and nitrogen systems, nitrogen systems, red phosphorus and compounds, while inorganic flame retardants are mainly antimony trioxide, magnesium hydroxide, aluminum hydroxide and silicon systems.

Imported Premium Fire Retardant,Flame Retardant Cresyl Diphenyl Phosphate,Plasticized Flame Retardant,Flame Retardant Abs

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