Homogeneous & emulsification pump is composed of a first-class working chamber. The working chamber is equipped with a group of 3-6-layer stators and 3-6-layer rotors. The tooth discs of each stator and rotor are from coarse to fine, so that the original granular materials of different thickness can smoothly enter the working chamber for layer by layer crushing, dispersion, fine, homogenization and emulsification. homogeneous pumps, emulsion pumps NINGBO DURREX PUMPS CO.,LTD , https://www.durrexlobepump.com
1. Spray method: The spray method designed to simulate the actual prevention and control of forests. In order to reduce the test error, each test insect should receive the same dose as much as possible, and the sprayer should have a certain pressure to make the size of the fog point consistent. Spray evenly.
2. Liquid immersion method: The test insects are separately immersed in different concentrations of diluted liquid, immediately removed, placed on absorbent paper to absorb too much liquid, and transferred into each group of containers, given fresh The leaves are used as feed, and the gauze is covered with gauze or gauze. It is kept indoors, room temperature is recorded, and the death of poisoning at different times is observed.
3. Membrane method: Spray the agent on a certain area of ​​the surface to form a uniform film (usually a petri dish with filter paper, or immerse the needle in the liquid) and then give it The tested pests are above, and after being in contact with the drug film for a certain period of time, they are returned to the normal container for feeding, or during the process of contacting the drug film, the poisoning death is observed.
4. Drip method: use a quantitative amount of liquid droplets, drop on the back of the chest of the test insects, and then periodically observe the death of poisoning. The advantage of this method is that the dose can be expressed by the amount of drug received per gram of worm (usually used in micrograms), the dosage is easy to control, and the test error is small; the disadvantage is time-consuming, the solvent used for the treatment, the location of the droplets, and the size of the droplets, etc. Can affect virulence. In adopting this law, these factors should be considered and consistent as much as possible in order to obtain accurate results.
Any herbicide is toxic, even if it is a low-toxic herbicide, excessive use will cause phytotoxicity problems, and farmers should pay attention to it.
Excessively high herbicides can easily cause phytotoxicity problems, so it is not recommended, but if you decide to buy the toxicity of herbicides? There are usually four ways to determine the toxicity of herbicides. Let's follow the small series to understand. .
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