Each pesticide has a certain shelf life and is safe and effective for use during the shelf life. Once the crops use pesticides that exceed the shelf life, they will not be able to cure diseases and insects. On the contrary, they will cause resistance to pests and diseases, delay the best period of pest control, bring difficulties to prevention or control, and prevent major diseases. It is to cause phytotoxicity of crops and cause irreparable consequences. Therefore, farmers must ban the use of expired pesticides. So how do you use only expired pesticides?
First, see the production date when purchasing pesticides. The purchase of pesticides must go to the formal agricultural units. When purchasing, first of all, you must see the variety of pesticides to be purchased, and then you should see the date of production and product specifications of the pesticides. Because the pesticides have a shelf life, if you find pesticides that exceed the shelf life, don't buy them, close to the shelf life of the pesticides. Try to use as much as you can to buy as much as possible.
2. Do not use the remaining pesticides in your home after the shelf life or pesticides that have no conclusive evidence to prove effective. If there are pesticides in the farmer's home last year, before using this year, first of all, it is necessary to see whether the label is in good condition. If it is still in the shelf life, if it is found that the pesticide has exceeded the shelf life, it is best not to use it. If the remaining pesticides are peeled off and the pesticides cannot be confirmed, do not use them indiscriminately to avoid causing phytotoxicity to crops and cause greater economic losses.
Third, the remaining pesticides are carefully kept. Improper storage of the remaining pesticides will reduce the insecticidal effect and even cause phytotoxicity. Therefore, the pesticides purchased by farmers in the same year have not been used up, and they are ready for reuse next year. The following points should be made during the storage process:
1. Sealed and stored. Some pesticides are volatile and invalid, causing air pollution. When storing, the cap must be tightened and sealed.
2. Maintain the temperature. Most powder pesticides are susceptible to quality at elevated temperatures. The higher the temperature, the easier the pesticide will melt, decompose, volatilize, and even burn and explode. Some emulsion pesticides will also destroy their emulsification performance and reduce the efficacy after encountering high temperature. Some bottled liquid pesticides freeze when they encounter low temperature, form a block, or cause the bottle to burst. Keep the indoor temperature above 1 °C when storing such pesticides.
3. Protect from light. Some pesticides are afraid of light, and exposure to light for a long time will cause decomposition and deterioration of pesticides. Avoid high temperature and sun exposure during storage.
4. Keep dry. Powder pesticides and plant conditioners are easy to absorb moisture and agglomerate. Therefore, the place where the pesticides are stored should be kept dry to prevent rain and snow. Also leave a window for ventilation and keep the humidity below 75%.
5. Avoid mixing. Pesticides are classified as alkaline, acidic and neutral. Alkaline pesticides include enemy scorpion, stone sulphur mixture, Bordeaux mixture, etc.; acidic pesticides include deltamethrin; neutral pesticides include gram sputum. These three different types of pesticides should be stored separately during storage and storage, and the distance should be kept above 0.5 meters. Otherwise, the pesticides will be deteriorated.
6, rigorous mixing. For the two pesticides that have not been used in the current year, they cannot be mixed in one bottle to avoid failure.
Fourth, the remaining pesticides are labeled. The remaining pesticides stored by the farmers must have a complete bottle sticker, and the words of the pesticide name, batch number, date of manufacture and shelf life should be clear. If the bottle is damaged, the farmer must write the shelf life and precautions for the pesticide and stick it on the outer packaging of the pesticide.
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