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Identification method of pesticide efficacy
When purchasing pesticides, it's essential to know how to identify their quality and effectiveness. In today’s complex pesticide market, it's easy to be misled by fake or low-quality products. The key is to recognize the right signs that indicate a good and effective product. Below are simple and practical methods for farmers to check the efficacy of different types of pesticides. These tips can help ensure you get the best value and results from your purchases.
1. **Emulsion Pesticide Efficacy Test**
(1) **Visual Inspection**: If you notice sediment or layering in the bottle, this may be a sign of poor quality. Place the bottle in hot water and let it sit for an hour. If the sediment dissolves and the layers disappear, the pesticide is still effective. If not, it has likely degraded and should not be used.
(2) **Shaking Test**: If the liquid separates into layers with oil floating on top, shake the bottle vigorously. Let it rest for an hour. If the layers remain, the pesticide has deteriorated. If the mixture becomes uniform again, it is still usable.
2. **Wettable Powder Pesticide Test**
(1) **Dissolution Test**: Sprinkle a small amount of the powder on the ground with some water. If it doesn’t dissolve within a minute, it may have lost its potency.
(2) **Mixing Test**: Mix 1 gram of the powder with a cup of water. If the mixture settles quickly and the liquid appears clear, it indicates the product has failed and should not be used.
3. **Powder Pesticide Quality Check**
(1) **Suspension Test**: Take 50 grams of the powder and mix it with a little water to form a paste. Then add more water and stir well. After 10–20 minutes, if the powder settles slowly and remains fine, it is of good quality. If it settles quickly and looks clumpy, the product may be ineffective.
(2) **Visual Inspection**: If the powder clumps together and doesn’t break apart easily, it has likely lost its effectiveness and should not be used.
By using these simple tests, farmers can make more informed decisions when buying pesticides. Always check the label, expiration date, and source of the product. Choosing reliable suppliers and trusted brands can also help avoid counterfeit or substandard products. Stay informed, stay safe, and ensure your crops get the best protection possible.
*China Pesticide Network*