Usually speaking of expired pesticides , the first reflection of everyone must be disposed of. But are the expired pesticides all deteriorated or have expired? Actually not! Today, we can discuss whether expired pesticides can be used.
Expired pesticides First, many people think that since it is an expired pesticide, according to the general cooking, it must be a "deterioration, failure" pesticide, can not be sold, used, but here Xiaobian to tell everyone, in fact, pesticide is a special commodity, Its shelf life is determined according to the expected control effect of plant diseases and insect pests under normal dose. Many expired pesticides, as long as the dosage is properly increased, strictly in accordance with scientific methods, still have good insecticidal and disease-preventing effects. The general commodities such as expired foods are obviously "ineffective, deteriorating" or not "safe". They cannot be used to solve problems by eating more and more.
Secondly, pesticides are highly toxic and polluting. I can't easily destroy them. Even professional technicians who use special technical measures to destroy it can only minimize pollution and have a high cost of destruction. Therefore, the state does not advocate the destruction of all expired pesticides.
Third, before the use of drugs, we must see the date of production and the date of warranty. If the date has not yet arrived, it must be used strictly according to the name of the name; after the date has passed, it is necessary to increase the dosage according to its efficacy. As some pesticides become obsolete, the efficacy will decrease. The pesticide manufacturers reminded them that some pesticides are outdated, but the efficacy remains the same. Therefore, when using outdated pesticides, the initial amount of use must be sprayed according to the nominal amount, and it will be observed 3-5 days after use to kill the pests. The following is not the same, the reputation needs to be basically increased in the original amount; if the second shot is not the same, the need to change pesticides or alternate use of pesticides; if the use of the next game, the reputation of the drug is still linked, Continue to use by name.
Fourth, we must grasp the dosage according to the stage of crop development. Especially in the seedling stage of the crop, the leaf area is small, the dosage should also be reduced, but the pesticide should still be blended according to the proportion of the nominal amount. At other stages, such as outdated pesticides, the amount of pesticides can be increased.
Finally, pesticides should be sprayed on average. When spraying pesticides, the syrup should always be connected to the pressure scale line of the air chamber. Thus, the pressure of the squirting powder will cause small droplets to be attached to the front and back of the blade. Generally, when spraying, the nozzle is placed under the crop blade, the mouth is facing upward, and the front and back of the blade can be sprayed evenly. It is not necessary to change the position of the nozzle. Generally, the spray is performed once, and it cannot be repeated several times in a unified time. Otherwise, It is also prone to phytotoxicity.
It can be seen from the above aspects that the expired pesticides are not all “failed and deteriorated” pesticides, but pesticides that do not meet the expected use effect according to the original dosage. According to the China Pesticide Network , as long as the dosage is appropriately increased, many expired pesticides can still be used. From the perspective of environmental protection, it is obviously more cost-effective to use the expired pesticides “use it” than to spend it.

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