Every year, farmers often end up with leftover pesticides that they cannot use accurately. To ensure safety and prevent accidents, it is recommended to store unused pesticides in sealed wooden boxes and clearly label them on the outside. These containers should never be kept in the same room as food, vegetables, or animal feed. Also, keep them away from flammable or explosive materials like fireworks or gunpowder. Never reuse original pesticide packaging for storing food or daily household items.
Most pesticides are volatile, so proper sealing is essential during storage. If not properly sealed, chemicals like dimethoate, dichlorvos, and phoxim can release harmful gases that pollute the air. Always make sure the caps are tightly closed and the containers are well-sealed.
It’s important to keep the pesticide labels intact. If the writing becomes unclear due to moisture or other factors, manually rewrite the information and attach it to the outer packaging. This helps avoid confusion and ensures safe handling.
If you have leftover pesticides that haven’t been fully used, never mix different types in one container. Mixing can lead to chemical reactions that reduce effectiveness or even cause dangerous situations. Some pesticides need to be stored separately—especially alkaline, acidic, and neutral ones—as they may interact and lose potency. Keep the storage area dry, with humidity below 75%, to prevent clumping caused by moisture. Avoid high temperatures as well; for example, emulsified pesticides may break down when exposed to heat, reducing their effectiveness. Similarly, powder-based pesticides can also lose potency at high temperatures. Store all pesticides in a cool, dry, and well-ventilated area, with temperatures not exceeding 35°C. However, if the temperature drops too low, liquid pesticides might freeze. It’s best to keep them above 1°C, especially during cold weather. You can cover them with straw or rice husks to provide insulation and protection.
According to the China Pesticide Network, many pesticides are sensitive to light. Prolonged exposure to sunlight can cause them to degrade or break down. Therefore, it's best to store them in dark places. Any expired or remaining small amounts of pesticides should be buried deeply rather than discarded into rivers or ponds to prevent environmental contamination.
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