When it comes to expired pesticides , everyone's first reaction is to dispose of them. Just as milk has expired, everyone will definitely throw it away in the first place. But are the expired pesticides all deteriorated or have expired? In fact, this is not the case! So, how to deal with expired pesticides? Let's introduce the safety net below.
First of all, many people think that since it is an expired pesticide, according to the general habits, it must be "deterioration, failure", and can no longer be sold or used. In fact, pesticides are a special commodity, and their shelf life is determined according to the expected control effect of plant diseases and pests under normal doses. 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, and we cannot destroy them easily. Even professional technicians who use special technical measures to destroy it can only minimize pollution and have a high cost of destruction. Therefore, it is not recommended to destroy all expired pesticides.
Third, before using the drug, we must see the date of manufacture and the shelf life. If the shelf life has not yet arrived, it should be used strictly according to the amount of guidance. If the shelf life is too late, it should be appropriately increased according to its efficacy. Because some pesticides are outdated, the efficacy will be reduced; some pesticides are outdated, but the efficacy remains the same. Therefore, when using outdated pesticides, the initial use amount must be sprayed according to the instructional dosage. After 3-5 days after use, the results of killing pests and diseases are observed. If the results are not ideal, the dosage can be basically increased in the original; If the result after the second spray is still not obvious, it is necessary to change the pesticide or use the pesticide alternately; if the effect is significant after use, it can be used continuously.
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, and the dosage should be reduced accordingly, but the pesticide should still be blended according to the proportion of the guidance. At other stages, an appropriate amount of expired pesticides can be added.
Finally, pesticides are sprayed evenly. When spraying pesticides, the syrup should always be connected to the pressure mark line of the air chamber. Under such pressure, the sprayed medicine will form fine droplets, which can be attached to the front and back of the blade on average. 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, it is better to spray once, and it is not possible to spray multiple times at the same time. Otherwise it is prone to phytotoxicity.
In fact, expired pesticides are not all “failed, degraded†pesticides, but pesticides that do not meet the expected results according to the original dosage. Many expired pesticides can still be used after an appropriate increase in dosage. Moreover, from the perspective of environmental protection, it is obviously more cost-effective to “use†expired pesticides than to spend more effort.
Cutting is an essential basic tool in the processing of ceramic components. Laser cutting technology has been favored for its non-contact, flexible, high efficiency and easy to achieve digital control. It is hoped that this high-energy beam processing method can be treated like metal materials. Complete the non-destructive cutting of ceramics. With laser as processing energy, the development potential in hard and brittle ceramic processing has been seen. It can realize contactless processing and reduce the damage caused by contact stress to ceramics. Ceramics have higher absorption rate for laser, focusing The energy of the high-energy laser beam acting on the local area of the ceramic can exceed 108 J/cm2, and the material can be melted and evaporated in an instant to achieve high-efficiency processing.
Laser Cutting Ceramics,Alumina Ceramic Substrate Sheet,Tobacco Laser Cutting Nozzle,Machinable Ceramic Filter
Dongguan Haikun New Material Co., Ltd. , https://www.nitrideceramic.com