Innovation story: spraying pesticides by drones is no longer a hassle

UAV spraying pesticides is becoming more common, but the density of solvents in pesticides is usually lower than that of water.
When sprayed with water, droplets of pesticides with small specific gravity are prone to drift.
When flying over field ponds, they may harm aquatic organisms
.
If a large amount of medicine floats to the water source, it may also cause a safety accident
.
Is there a pesticide that is green, safe and not prone to drift to solve the worries of drone spraying? The "trouble" of drone spraying pesticides is not just drifting
.
Compared with manual spraying, the pesticide concentration of aerial spraying is much higher, and it usually needs to be diluted with water
.
In order to spray a small amount of potion evenly, most airplanes are equipped with centrifugal nozzles with a small caliber
.
At present, the commonly used pesticide formulations on the market are mainly divided into solid formulations and liquid formulations
.
The solid dosage form is basically composed of solid fillers, but these fillers are difficult to dissolve in water.
Therefore, if the solid dosage form is used for aircraft spraying, it is very easy to block and wear the nozzle, which not only greatly reduces the spraying efficiency, but also directly affects the plant protection effect
.
Liquid pesticide formulations tend to become unstable emulsions after being diluted with water.
They should not be left for a long time after preparation.
The formulated pesticides must be sprayed within the specified time, otherwise the pesticides will delaminate and precipitate, and the efficacy of the pesticides will disappear
.
Therefore, if the weather is not suitable for flying, the medicine cannot be recycled and has to be discarded, causing waste
.
At the same time, to prepare pesticides on the field, it is necessary to find clean water sources and large containers, which is very inconvenient to operate
.
In addition, liquid pesticide formulations are also prone to drift, and it is difficult to accurately control the spray space of pesticides when large-scale drones are sprayed
.
More importantly, liquid pesticide formulations usually contain harmful ingredients
.
Taking the liquid pesticides of emulsifiable concentrates as an example, the emulsifiable concentrates of pesticides usually contain toluene as a solvent, and toluene and xylene are recognized as toxic and carcinogenic substances
.
They will penetrate into the soil and groundwater with the application of pesticide formulations, seriously polluting the environment, and long-term human exposure may cause a series of diseases such as leukemia
.
In response to these problems, Nanjing Shansi Biotechnology Co.
, Ltd.
recently launched a special agent for aviation plant protection
.
Professor Zhang Ziyong of Jinan University and Dean of Shansi Research Institute said that unlike traditional pesticides, this medicine uses nanotechnology.
In layman's terms, the pesticide is made into an aqueous formulation of pesticide nanocapsules.
The water and solvent in the droplets evaporate to form large crystalline aggregates, which present uniformly dispersed nanoparticles
.
The small size and large number of particles can improve the efficacy and have a slow-release effect
.
At the same time, the use of water instead of organic solvents and the use of pesticide water formulations to replace emulsifiable concentrate formulations eliminates the environmental impact of harmful solvents and additives
.
According to reports, compared with traditional pesticides, the aerial plant protection agent does not need to be diluted in the field to find water sources.
It can be used directly with a certain proportion of the agent as needed, and it is not easy to block the nozzles, which greatly improves the operating efficiency
.
In addition, the performance of the agent is more stable, storage and use are very convenient, precipitation, precipitation, and stratification will not occur, and the efficacy of the drug is stable.
What is left after a spray can be recycled again, reducing unnecessary waste
.
"Because the solvent of the nano-aqueous agent is mainly water, the density is close to that of water.
At the same time, the anti-
floating agent is specially added, so it is less prone to drift when spraying .
Even if a little is spilled on the pond, it is green, low-toxic, and basically Will not affect the environment and aquatic life
.
" Zhang Ziyong said
.
Zhang Ziyong said that the aviation plant protection chemicals can not only ensure the safety of the environment and operators after spraying pesticides, but also ensure the safety of crops and food
.
He believes that whether it is using drones or manned helicopters, aviation plant protection is the general trend of future development, and the selection of safe and convenient aviation plant protection special agents can effectively promote the healthy development of the aviation plant protection industry
.
In addition, safe and environmentally friendly pesticides will also help the country complete the zero-growth program of pesticides, reduce pesticide losses, develop water-saving agriculture, improve plant protection efficiency, and reduce the harm of pesticides to humans, animals, and aquatic organisms
.