Practice has proved that cotton is to be productive and management is the key. In the growth and management of cotton , spraying is an important part of management. Common pests in cotton: locusts, red spiders, blind mites, red bollworms, cotton bollworms, gold steel drills, etc. These pests have different parts for spawning and harm, so be sure to pay attention to the parts.
In the cotton seedling stage, aphids, red spiders, etc. are harmful on the back of the cotton leaves. When spraying pesticides, the syrup should be sprayed on the back of the leaves. The red bollworm that occurs in the middle and late stages of cotton lays eggs on the back of the tender tip, tender stem and young leaves. After ringing, most of the eggs are produced between the young bracts and the bell shell, and the larvae enter the young age. The eggs of the cotton bollworm are produced on the front side of the cotton leaf, and the larvae bite the buds, flowers, and bells. The eggs of the blind cockroaches are produced in the leaves, and the sap of young leaves and small buds are sucked early.
Control the red bollworm, the syrup should be sprayed on the lower blue bell; control the cotton bollworm, the syrup should be sprayed evenly on the front and the tender tip, the stems and leaves and the buds; the blind mites are large in activity, and the syrup should be sprayed on the front of the leaves. , tender, stem and bell.
The majority of cotton farmers should pay attention to: in the cotton spray, to protect the flower bell, cotton often blooms in the morning, if sprayed at this time, it is easy to make the pollen particles swell and rupture, affecting normal pollination, and spraying after 4 pm The drug, the pollination process is basically over, and the spray effect is small.
Residual chlorine refers to the residual amount of chlorinating agents (such as chlorine, sodium hypochlorite, etc.) added in the water treatment process. Residual chlorine can play a role in sterilization and disinfection, but too high residual chlorine content will also have an impact on human health. Therefore, it is very important to monitor residual chlorine for drinking water, swimming pool water and other water bodies that need to maintain a certain residual chlorine content. The residual chlorine sensor adopts a membrane-covered amperometric system, which is accurate in measurement and can monitor the residual chlorine content in water in real time. The output mode has the choice of 4-20mA or RS485. The residual chlorine probe has a compact shape, and we provide a matching flow cell to make the measurement results more accurate. The membrane cover of the residual chlorine electrode can be replaced and has a long service life. We also provide many measuring ranges for customer to choose, 0~2ppm, 0~5ppm, 0~10ppm, 0~100ppm, 0~200ppm. Users can choose according to the water quality.
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