Anti-pharmacy research and development strategy of flying prevention, and even more than a auxiliaries so simple!
Fly fire prevention has driven the rapid development of the related supporting industries and brought new expectations to the agri-industry agro-industry industry, or established a team of transforming plant protection service providers for the fight drugs team, or built a full-flight anti-drug treatment program based on superior products. Through the joint efforts of flying defense manufacturers in recent years, drone fight drugs have gradually been understood and accepted by people. However, as an important link in the development of plant protection and fly defense, there seems to be no standard answer for the research and development of special agents for flying defense. The fly defense is a high-concentration spray. The addition of special additives for flying defense is more to achieve anti-evaporation, anti-drift, easy spread and other purposes, while the traditional pharmaceuticals used for flying defense, just add a auxiliaries so simple?
As a first-line expert in the research and development of pesticide formulations in China, Prof. Xuemin Wu from China Agricultural University divided the entire flight defense system into plant protection strategies, fly defense agent selection, and combination of medicine and machinery. Wu Xuemin said that in the past two years, the plant protection UAV has developed rapidly in China, but the relative amount of pesticides that can really be used for flying defense is relatively lacking, which to some extent hinders the development of the flying defense industry.
Anti-drug spraying is an ultra-low-volume spray, and there is a big difference between low dilution and high dilution. The key is how to make the agent still highly dispersed under low dilution times. In the prevention and control of diseases and insect pests, what medicine is selected is one thing. The key is that the dosage form must also be matched. The current situation is that we only have medicine and no agent. Everyone is not very familiar with the flying defense preparations. From the point of view of formulation development, it is necessary to accelerate the development of highly dispersed formulations suitable for low-volume spraying.
In the world, the most widely used fly defense applications are developed countries such as the United States, Australia, and Japan. The fly defense agents use a large amount of oil sprays. When spraying pesticides, new mineral oils, vegetable oils, and long-chain hydrocarbons are used for dilution. The effect is also better, and these basically do not need to fly in domestic defense. Water spray is also an important part of fly defense. The key to the problem is that there are not many drugs currently available for low dilution.
With regard to the selection of preparations, the vast majority of current fly defense preparations are based on field crop pests and diseases, and no special preparations with low dilution have been developed. Take WP as an example, dry comminution is usually used. The smallest particle size is larger than 10 microns and the average particle size is 20-30 microns. It is easy to cause blockage of the nozzle. It is not suitable for anti-drug fight from the source. The real fly defense preparations should be wet comminution. Instead of wettable powders (WP) with suspension (SC) and water-dispersible granules (WDG) with dry suspension (DF). In our country, although the dry suspension is classified as a water dispersible granule on the registration, there is still a certain gap between the physical properties and the processing technology. WDG will have a larger particle size after kneading.
Oil Suspension (OD): Microcapsules (CS) with controlled release can also be added, processed into oil-suspended microcapsules, or water-suspended microcapsules.
ULV ultra-low-volume spray formulations: mainly diluted with oil, mainly fly defense, the concept of ultra-low capacity is slowly being diluted.
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