First, see the description, recognize the three cards.

1. Pesticide registration number: Issued by the Ministry of Agriculture. There are two types of numbers in China: one is the official certificate number, and the former is the PD letter. There is also a temporary registration number, the number before the LS letter. The numbers that start with other letters or have certain provinces are not genuine products.

2. Production approval number: Beginning with the HNP letter, issued by the Ministry of Chemical Industry.

3, the implementation of the standard certificate number: issued by the Ministry of Chemical Industry, beginning with the HG letter. But there are also numbers for provinces or companies.

Second, look at the effective ingredients, valid period

The active ingredient of pesticides is very important. You can't just look at the price and buy cheap goods. For example, the active ingredient of thiophanate-methyl (methyltropine) is 70% and 50%, carbendazim is 50% and 25%, and the price difference is 1.5 and 1. In addition, there are unilateral and compound points. The compound (some with F) is less effective than the unilateral ones. Sulphur powder is used for filling, so the price is much cheaper. All these drugs should have a production date, and the general shelf life of pesticides is two years. Do not buy futures.

Third, take a look, touch quality, use fine observation.

1, EC, water agents. See if the liquid is clear, turbid, precipitated, and crystallized cannot be bought. Observed when used, emulsification is fast, no oil on the surface of the water, and no delamination for 1 hour.

2. Wettable powders. Pressing the pack with your finger, it feels like the water it contains. It feels fluid and the medicine is fine. The finger pressure felt very thick, very dead, like pressing on flour, this medicine is not good. Observe that the powder falls on the surface of the water when it is used. It will not sink, stir, and spread quickly (within 30 seconds). Like milk, this medicine is good. On the contrary, pour out half of the surface of the powder and half of the bottom of the powder, and mix it with force to disperse it. This medicine is not good.

Fourth, look at the scope of use, buy tickets to buy pesticides, see the package on the use of registered crops and control objects (diseases or insects), which is approved by the state, the recommended object can only be used as a reference. Some pesticides are exquisitely packaged, instructions for treating diseases, or killing any insects. It is best not to buy such drugs. Otherwise, they cannot cure diseases and insects, affecting your harvest, or causing phytotoxicity and even more damage. When buying pesticides at the pesticide shop, you must take notes to protect your legal rights.

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