This series of permanent-magnet synchronous gearless traction machines is directly driven by a low-speed, high-torque, 3-phase permanent magnet synchronous motor, and has the advantages of low energy consumption, low noises, no pollution, and little maintenance.
These traction machines can be arranged for providing upward traction or downward traction, and have remote manual brake release function. Wrap angle of the traction machines can be only 180°.
Standard Gearless Traction Elevator, Gearless Elevator Traction Machine, Gearless Elevator Machine, Gearless Traction Motor
Gearless Traction Machine,Gearless Traction Elevator, Gearless Elevator Traction Machine, Gearless Elevator Machine, Gearless Traction Motor Ningbo Xinda Elevator Traction Technology Co., Ltd. , https://www.xinda-elevator.com
By using flat frame structure with three mounting surfaces, this series of traction machines can be installed on bottom floor or any middle positions or on the top of shaft way.
In a recent conversation with a farmer from Shuyang County, Jiangsu Province, there was some uncertainty about whether the use of buprofezin alongside zhongdingwei could be effective in controlling cornfield aphids. The concern raised was whether this combination might lead to phytotoxicity. In response, the **China Pesticide Network** has gathered and analyzed relevant information to provide clarity on this matter.
It is important to understand that the main threat posed by *Laodelphax striatellus* (the small brown planthopper) to corn is its role in transmitting viral diseases, such as maize rough dwarf virus. Fortunately, corn plants develop resistance to these diseases during their adult stage, especially after the 9-leaf stage. This means that even if infected, the plant may not show severe symptoms. Therefore, the best strategy for managing maize rough dwarf disease involves adjusting planting dates to avoid peak insect activity, using resistant corn varieties, and applying targeted control measures against *L. striatellus* as part of an integrated approach.
Pesticides are a key tool in managing *L. striatellus*, particularly during the period just before and after wheat harvest when large numbers of adult insects migrate into corn fields. At this time, it's crucial to apply fast-acting and effective insecticides. Recommended options include pymetrozine, chlorpyrifos, isoprocarb, zhongdingwei, and beta-cypermethrin. However, caution must be taken when using organophosphorus or pyrethroid-based pesticides. For example, 50% rice flour should be diluted at 1000–2000 times, while 48% chlorpyrifos emulsifiable concentrate should not be diluted below 2000 times. Pyrethroids are typically used at 2000–3000 times dilution. It’s worth noting that dichlorvos, phoxim, and fenvalerate can cause leaf burn on corn and should be avoided.
Buprofezin was once widely used to control *L. striatellus*, but according to research from the Plant Protection Institute of the Jiangsu Academy of Agricultural Sciences, repeated use has led to strong resistance in the local population of this pest. As a result, buprofezin is no longer an effective option in many areas. The **pesticide network** advises farmers to avoid over-reliance on any single pesticide. Instead, rotating between different chemical classes can help delay the development of resistance and ensure more sustainable pest management practices.