First, view the label instructions
All pesticides that are formally approved for production and sales by the State are printed with the “Registration Certificate No.â€, “Practical Certificate No.†and “Product Standard No.†on the product label description. For pesticides without a license number or "three certificates," they should be cautious in case they are deceived.
When purchasing, you must also focus on the name of the pesticide on the product label instructions. Active ingredient content, date of manufacture (production batch number). 1 The name of the pesticide includes the product name and generic name of the product. For those pesticides that have only the product name but no generic name (mostly generically used products with unusually expensive ingredients), it is best not to purchase it. 2 Do not purchase if there is no active ingredient content. 3 If the quality assurance period is exceeded, the efficacy or failure will be reduced. The shelf life of powders, emulsifiable concentrates and liquids is 3 years, 2 years and 1 year, respectively. In addition, be careful not to purchase pesticides that are free from manufacturers, that show signs of alteration, and that packaging is damaged or leaking.
Second, appearance inspection and sampling identification
1. The appearance of the emulsifiable concentrate is dark brown or light brown transparent liquid, non-delaminated, non-cloudy, no precipitate, no crystal. Take a little drip into the water, it can quickly spread, showing a cloud-like, slightly stirring to form a uniform and stable emulsion, no slick oil on the water surface, no precipitation on the water bottom.
2. The appearance of the water agent is transparent and there is no precipitation or impurities.
3. The appearance of powders and wettable powders requires loose texture, no agglomeration, high fineness, and uniform color. Use your thumb and index finger to pick up some of the fines. If your fingers are loose, if the powder is still loose, it shows good dryness. If it sticks together, it is damp or the water content is too high and the quality will be affected. The wettable powder is thrown into water, and after shaking or slightly stirring, it becomes a uniform milky liquid, and the powder is suspended in water without precipitation or with little precipitation.
4. The appearance of granules is required to be smooth and have a certain degree of firmness. Friction between the drug layer and the carrier does not occur due to mutual friction.
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