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Identification method of pesticide efficacy
When buying pesticides, it's essential to know how to identify their quality and effectiveness. In today’s complex pesticide market, where counterfeit and low-quality products are common, knowing the right methods can help you make better choices. The following tips provide simple yet effective ways to check the quality of different types of pesticides. These methods are designed to help farmers ensure they are getting reliable products that work as intended.
1. **Identifying the Quality of Emulsifiable Concentrate Pesticides**
(1) **Visual Inspection**: If you notice sediment or oil separation in the bottle, this may indicate poor quality. To test, place the bottle in hot water and let it sit for an hour. If the sediment dissolves and the oil separates, the product is still effective. However, if no changes occur, it may have lost its potency.
(2) **Shaking Test**: If the pesticide separates into layers, with an oily film on top, shake the bottle vigorously and let it settle for an hour. If the layers reappear, the product has likely degraded and should not be used. If the mixture remains uniform, it is still viable.
2. **Checking the Quality of Wettable Powder Pesticides**
(1) **Dissolution Test**: Sprinkle a small amount of the powder onto the ground with some water. If it doesn’t dissolve within a minute, it may have lost its effectiveness.
(2) **Mixing Test**: Take 1 gram of the powder and mix it with a cup of water. If the mixture settles quickly and the liquid becomes clear, it suggests the pesticide has degraded and should not be used.
3. **Testing the Quality of Dustable Powder Pesticides**
(1) **Suspension Test**: Take 50 grams of the powder, add a little water to make a paste, then stir with more water. After 10–20 minutes, good quality powder will remain suspended and settle slowly. If it settles quickly and forms a lot of sediment, it may have lost its effectiveness.
(2) **Observation Test**: If the powder clumps together and doesn't break apart easily, it indicates that the product has deteriorated and should not be used.
By using these simple tests, farmers can make informed decisions when purchasing pesticides, ensuring they get products that deliver the desired results. Always check the packaging for proper labeling, expiration dates, and manufacturer information to further verify authenticity. For more detailed guidance, visit China Pesticide Network.