The second dilution of pesticides, also known as the two-step preparation method, is a widely used technique in pesticide formulation. This approach involves preparing the pesticide in two stages, which helps dissolve certain water-insoluble wettable powders (WPs) or small quantities of pesticides more effectively. As a result, the mixture becomes more uniform, leading to more accurate dosing. This not only enhances the effectiveness of the pesticide but also minimizes the risk of phytotoxicity—damage to plants caused by excessive chemical exposure. Additionally, this method reduces the likelihood of accidental poisoning from direct contact with concentrated pesticide solutions. There are several ways to perform a two-step dilution depending on the equipment being used: A. For small-scale applications, you can use a medical saline bottle that has clear volume markings. Place the required amount of pesticide into the bottle, add a measured quantity of water, and shake well to create a concentrated mother solution. Then, use a measuring cup to accurately transfer the correct amount of the mother solution into the final spray tank. B. When using a knapsack sprayer, you can first add a small amount of water to the sprayer’s tank, then add the pesticide and shake thoroughly to mix. After that, top up the tank with water and mix again to ensure even distribution. C. For large-area applications using a motorized sprayer, it's recommended to prepare the mother solution in a larger container such as a barrel or drum. Once the mother solution is ready, transfer it to the sprayer’s tank for the final dilution and thorough mixing. It is crucial to calculate and measure the water used in the mother solution carefully. Any mistakes in measurement can lead to improper concentration, which may reduce the effectiveness of the pesticide or cause harm to crops. Always follow the instructions provided on the product label and avoid making changes without proper knowledge. By following the two-step dilution method, users can achieve better results while maintaining safety and efficiency in pesticide application.

Rotor Pump With Rectangle-inlet

We are a world-leading technology-based enterprise focus on R&D and manufactures non-Newtonian fluid conveying equipment. We specialize in rotary pumps, homogeneous pumps and grinding pumps. We have obtained 11 invention Patents and 46 practical patents, and won many national honorary titles.


Twin-rotor lobe pump are multi-functional and bi-directional positive displacement pumps, produced with fine technology. These products use synchronic rotors, driven by a pair of synchronic gears in the gear box. Transmitted by the main shaft and the sub-shaft. The rotors move synchronically in counter-clockwise a directions, which, consequently, varies the pump capacity and builds up high vacuum capacity and emission pressure. It is particularly suitable to pump sanitary medium, high-corrosive and high-viscous medium.


Rotor pump with with rectangle-inlet: The inlet design is V-inlet, enlarge the inlet diameter, convenient for high viscosity medium enter pump body. Suitable for high viscosity or thickness medium, such as moon cake filling, bean paste filling and other medium with poor fluidity.


In the past 30 years, we dedicate to provide the scientific and professional solutions in fluid field. In the field of complex fluid transportation, our company's R&D technology, manufacturing technology, application technology is at the leading position in the world.


Durrex pumps can be widely used in food, consumer chemical, refined chemical, paper making, chemical fiber, pharmaceuticals, coating, etc. We will continue to focus on scientific research and innovation, improve the level of precision manufacturing, and continuously promote the intelligent development of fluid transportation industry, to create greater value for global users


Rotor pump with rectangle-inlet, Lobe Pump with rectangle-inlet, Rotary pumps with rectangle-inlet, Rotary lobe pumps with rectangle-inlet, Stainless Steel pumps with rectangle-inlet

NINGBO DURREX PUMPS CO.,LTD , https://www.durrexlobepump.com

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