Medicines and pesticides have a certain shelf life. Once people eat expired drugs, they will not cure the disease, but will also have other undesirable consequences; if the crops use pesticides that exceed the shelf life, it will not only fail to cure the disease. The effect of insects, on the contrary, will also cause phytotoxicity to crops. Nowadays, it is the high incidence of crop pests and diseases, and it is also the season when pesticides are used most frequently. In order to prevent the occurrence of various accidents and avoid unnecessary economic losses, the author reminded the farmers: Do not use expired pesticides. At the same time, several suggestions were made for reference by farmers' brothers when using pesticides. First, buy pesticides must go to the formal agricultural resources units, in the purchase, we must first see the varieties of pesticides to be purchased, then look at the pesticide production date and product specifications, because pesticides have a shelf life, if found more than Do not buy shelf life pesticides, pesticides close to the shelf life, to try to do how much to buy, buy now use. 2. If there are remaining pesticides in the farmer's home last year, before using it this year, it is first necessary to see whether the label is in good condition. If it is still in the shelf life period, if it is found that the pesticide has exceeded the shelf life, it is advised not to be better. When the remaining pesticides are detached from the label and cannot be identified, they must not be used indiscriminately, so as not to cause phytotoxicity to the crops and cause greater losses to the economy. Third, where the purchase of unused pesticides this year, ready to put into use next year, the agent must be tightened bottle cap stopper, powder to tie the plastic bag to prevent evaporation failure. However, it is worth mentioning that it is absolutely necessary not to mix and store several types of pesticides left over from storage. The excess pesticides to be stored must have a complete bottle sticker, the name of the agricultural medicine, the batch number, the production date and the shelf life should be clear, and the stored pesticide must be placed in a cool and ventilated place.
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