With the development of economy, people pay more and more attention to the development of forestry. Resources are always an important part of the current stage and future development, which directly shows the importan...With the development of economy, people pay more and more attention to the development of forestry. Resources are always an important part of the current stage and future development, which directly shows the importance of forestry work. Forest diseases and insect pests often endanger the healthy growth of forestry. In order to ensure the health of forestry, the prevention and control of forest diseases and insect pests must be strengthened. In addition, the sound development of forest pest control will greatly improve the quality level of forestry, thus ensuring that ecological and environmental benefits can be guaranteed. In the next part of this paper, the research of this work will be carried out.展开更多
Aviation spraying is one of the most important methods for the treatment of forestry pests and diseases,which has a high operation efficiency and effectiveness.The combination of aviation spray and biological pesticid...Aviation spraying is one of the most important methods for the treatment of forestry pests and diseases,which has a high operation efficiency and effectiveness.The combination of aviation spray and biological pesticides to reduce the impact of pesticide spray on environment has become an important development in the direction of agricultural aviation.In order to explore the effects of aviation spray parameters on particle size distribution and activity retention of biological pesticide droplets,a system of droplets size test and an activity retention rate test system of biological pesticides were constructed.The related experiments were conducted by changing the structural parameters of the rotary cage nozzle(the diameter of nozzle)and the technical parameters of the operation(rotary speed and flow rate).The results showed that the average relative width S of the droplets of the rotary cage nozzle was close to 1,and the droplet distribution was uniform.The influence factors on the particle size distribution of biological pesticide droplets were rotary speed,nozzle diameter,medium and flow rate in descending order.The rotary speed,nozzle diameter,and medium had a significant influence on droplet size distribution.The average activity retention rate of Bacillus thuringiensis was 88.83%,and the germination rate of Beauveria bassiana was 89.80%.The rotary speed had a significant effect on the activity retention rate of bacterial and fungal biological pesticides,and it was negatively correlated.The rotary speed was between 3000-5000 r/min,and the activity retention rate was higher.The research results can provide guidance for spraying biological pesticides in aerial plant protection operations with rotary cage nozzle.展开更多
文摘With the development of economy, people pay more and more attention to the development of forestry. Resources are always an important part of the current stage and future development, which directly shows the importance of forestry work. Forest diseases and insect pests often endanger the healthy growth of forestry. In order to ensure the health of forestry, the prevention and control of forest diseases and insect pests must be strengthened. In addition, the sound development of forest pest control will greatly improve the quality level of forestry, thus ensuring that ecological and environmental benefits can be guaranteed. In the next part of this paper, the research of this work will be carried out.
基金The research was funded by the National Key Research and Development Program of the 13th Five-Year Plan(Project No.2018YFC1200400,and Project No.2018YFD0600202).
文摘Aviation spraying is one of the most important methods for the treatment of forestry pests and diseases,which has a high operation efficiency and effectiveness.The combination of aviation spray and biological pesticides to reduce the impact of pesticide spray on environment has become an important development in the direction of agricultural aviation.In order to explore the effects of aviation spray parameters on particle size distribution and activity retention of biological pesticide droplets,a system of droplets size test and an activity retention rate test system of biological pesticides were constructed.The related experiments were conducted by changing the structural parameters of the rotary cage nozzle(the diameter of nozzle)and the technical parameters of the operation(rotary speed and flow rate).The results showed that the average relative width S of the droplets of the rotary cage nozzle was close to 1,and the droplet distribution was uniform.The influence factors on the particle size distribution of biological pesticide droplets were rotary speed,nozzle diameter,medium and flow rate in descending order.The rotary speed,nozzle diameter,and medium had a significant influence on droplet size distribution.The average activity retention rate of Bacillus thuringiensis was 88.83%,and the germination rate of Beauveria bassiana was 89.80%.The rotary speed had a significant effect on the activity retention rate of bacterial and fungal biological pesticides,and it was negatively correlated.The rotary speed was between 3000-5000 r/min,and the activity retention rate was higher.The research results can provide guidance for spraying biological pesticides in aerial plant protection operations with rotary cage nozzle.
