Flying defense: the combination of guns and bullets can strike accurately

In recent years, a new round of agricultural changes triggered by factors such as the aging of the rural population, land transfer, and increased planting costs are stimulating demand for high-efficiency plant protection operations.
Ultra-low-altitude remote-controlled flying plant protection machines have emerged and become a hot spot in the industry
.
? "Plant protection flying defense will usher in the spring of development, and there will be a golden opportunity for pharmaceuticals and special additives suitable for flying defense operations
.
" This was uploaded from the "2016 Aviation Plant Protection Application Technology Development Exchange Conference" held in Changsha, Hunan a few days ago.
An important piece of information
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? Flying against the wind and surging? The most challenging and attractive new industry? From the agrochemical giant Xin'an Chemical and Anhui Huilong's agricultural capital injection "Nongfeike", to the launch of the first agricultural drone by DJI Innovation and Zero Intelligence.
Then to Wuxi Hanhe and Shenzhen Tianying Brothers landing on CCTV, a series of focal events triggered an upsurge of attention in the plant protection industry
.
He Xiongkui, a well-known plant protection machinery expert and professor at China Agricultural University, pointed out that the ultra-low-altitude remote-controlled flying plant protection aircraft is like the modern high-speed railway of China’s plant protection machinery.
Once the application technology matures, there will be a blowout
.
Plant protection machine is a new type of pesticide application tool, which needs to be developed, promoted, and popularized
.
Shao Zhenrun, a researcher at the National Agricultural Technology Center, believes that pesticide spraying by plant protection machines saves labor, time, labor, and medicine, and can implement group prevention and group control in a short period of time
.
At the same time, when using a plant protection machine for spraying operations, when the liquid droplets are sprayed from the sprayer, they are accelerated by the downward airflow of the rotor to form an aerosol flow, which directly increases the penetration of the droplets of the liquid droplets to crops and reduces the drift of pesticides.
It also increases the deposition and coverage of the drug solution on the target crops, and is a good helper in the implementation of pesticide reduction and damage control
.
In addition, due to the use of remote control, the risk of poisoning caused by long-term exposure to pesticides is reduced
.
Therefore, in the context of the structural shortage of young and middle-aged labor in rural areas and the continuous increase in agricultural labor costs, the application of plant protection machines must play an important role in the stable development of agriculture.

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Tang Huilian, deputy director of the Plant Protection and Quarantine Station of Hunan Province, said that in the development of agricultural machinery modernization, agricultural machinery such as mechanical tillage, mechanical insertion, mechanical sowing, mechanical harvesting, and mechanical drying have developed rapidly.
Plant protection is an important part of China’s agricultural production.
Links are also weak links, and plant protection machinery is the shortest one
.
To develop modern agriculture, it is necessary to develop high-efficiency plant protection machinery suitable for China's national conditions.
The development prospects of plant protection machinery are broad, and the cause of plant protection and flying defense will become the most challenging and attractive new industry
.
? Guns and bullets are indispensable? The research and development of special agents for flying defense needs to keep up? "The molecular size and stability of some agents on the market are mostly not suitable for flying defense operations of plant protection machines.
For example, wettable powders are easy to block the nozzles.
New formulations for man-machine flight control operations are imminent
.
” Qu Xiang, manager of Hunan Dr.
Agricultural Service Co.
, Ltd.
, pointed out that the development of special spraying agents for plant protection machines requires screening of active ingredients, formulations, and auxiliaries in order to obtain high activity and a dosage per acre.
It is a special product suitable for flying defense operations that is less, safe to crops, and not suitable for volatilization, drift, or clogging of the nozzles
.
? "Ultra-low-altitude remote-controlled flight plant protection aircraft has become a highlight of modern plant protection operations, but special additives suitable for plant protection operations have become a development shortcoming.
We must vigorously develop pesticide green synergistic technologies
.
" Beijing Guangyuan Agrochemical Co.
, Ltd.
Zhang Zongjian, chairman of the responsible company, said that the droplets sprayed by the plant protection machine have a small particle size and are easily affected by external conditions when spraying in the field
.
For example, when small pesticide droplets are falling, on the one hand, when the temperature is high and the air is relatively dry, they are easy to evaporate directly, causing the loss of pesticides; on the other hand, with the flow of air, small droplets are easy to occur.
Drift, the loss of pesticides can easily cause drifting and phytotoxicity
.
In addition, when pesticide droplets fall on plant leaves or insect body surfaces, they also face the problem of evaporation.
The droplets are small and evaporate quickly, and the pesticide cannot act on the target within the effective time
.
If a special spray additive is added to the chemical solution, the current situation of rapid evaporation, heavy drift, and difficulty in absorption when plant protection drones are sprayed can be significantly changed, and the spray effect of plant protection drones can be greatly improved
.
Therefore, it is necessary to increase the research and development of multi-functional additives that help the plant protection machine.

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Yuan Huizhu, a researcher at the Institute of Plant Protection of the Chinese Academy of Agricultural Sciences, pointed out that if a plant protection machine is compared to a gun, the medicines and adjuvants are bullets.
To play the role of advanced plant protection weapons, it is necessary to insist on the integration of guns and bullets and simultaneous development
.
The development of plant protection and flight control needs special agents to escort
.
? Hebei Weiyuan Biochemical Pesticide Co.
, Ltd.
Promotion Director Zhao Jianqin believes that the emergence of plant protection machines will bring about a major change in pesticide formulations
.
Special agents for aviation spraying are different from ordinary agents for conventional spraying.
They must adapt to factors such as low water consumption, ultra-micro spray, high concentration of liquid medicine, fine spray droplets, and down-pressure wind field of plant protection machines
.
In addition to the performance of the plant protection machine, the accuracy of spraying, and the control level of the pilot, the medicament is an extremely critical factor and an important restrictive factor for the plant protection machine to enter the market
.
? Combination of machine, material, and technology? Plant protection technology is the key and difficult point? Tang Huilian pointed out that in addition to the human factor of the manipulator, the combination of machine, material and technology is very important.
Good guns are good bullets.
Important, plant protection technology is the key, but also the difficulty, which must not be ignored
.
The reason why Hunan's plant protection and flying defense business has attracted the attention of the whole country is the courage to explore, practice, and innovate in plant protection and flying defense technology
.
Liu Jie, secretary general of the Hunan Crop Diseases and Pests Professional Control Association, believes that in order to achieve sustainable development of plant protection and fly prevention, it is necessary not only to reduce control costs, but also to improve operational efficiency, and to prevent risks and form a set of sustainable profitability.
Pattern
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The focus of the promotion of flight control operations is plant protection technology, and the difficulty is that there is no successful experience that can be replicated
.
? According to Liu Jie, the Hunan Provincial Crop Pests and Diseases Specialization Unified Prevention and Control Service Alliance was established less than a year ago, and it has made remarkable achievements in promoting the development of plant protection and flying prevention.

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The first is to organize pesticide, adjuvant, and plant protection machine manufacturers to participate, to carry out comparative demonstration trials of screening good machines, good medicines and good additives, and to select efficient and safe prevention and control weapons for the professional unified prevention and control service organization; second, to actively explore High-efficiency and cost-effective crop solutions, guide service organizations to rationally use pesticides in rotation, delay the emergence of resistance, and promote pesticide use reduction; third, dare to break into the restricted area, boldly explore flying prevention closed weeding, stem and leaf treatment weeding trials , Scientifically formulate "one letter, two kills and three supplements" technical regulations for weeding and flying control in paddy fields that are suitable for flying control operations; the fourth is to explore the technology of flying seeds, flying fertilizers, and flying flowers pollination, and continuously expand the application range of plant protection machines, and improve plant protection machines The use efficiency of the service organization is to enhance the profitability of service organizations; the fifth is to introduce management measures for plant protection and fly-prevention operations, carry out industry self-discipline, eliminate high-toxic and high-risk pesticides and prohibited pesticides from farming, and ensure the quality and safety of agricultural products
.
? Liu Jie said that closed weeding of rice is something the industry dared not think of, because if technical safeguards are not in place, it is easy to cause phytotoxicity and cause compensation
.
In early April of this year, the Service Alliance conducted a demonstration test on an area of ​​100 acres with a comprehensive program of "Pretilachlor + Mesopyridine + Special Auxiliary Agents".
After three investigations on the efficacy and safety of the drug for nearly a month, this program was proved.
It is safe and feasible, and an enlarged demonstration test of 5000 acres is currently being carried out
.
Through experiments, we discovered the key technology of “flying control and weeding before sowing”.
This technology has been carried out by more than 20 alliance members including Hunan Wanjiafeng Technology Co.
, Ltd.
and Yiyang Farmland Advisor Rice Planting Cooperative for an area of ​​nearly 50,000 mu.
The verification test shows that the control effect is significant and the safety is high
.