1. After harvesting wheat, if there are a lot of weeds in the ground, it is necessary to use a herbicide. Glyphosate is a systemic herbicide that does not show any effect in the early stage after spraying, but in about two weeks, weeds will die from the roots.
Second, the weeds that are unearthed from closed weeds include B-a mixture, Yucaojing and Dua mixture. Generally, 200 grams of preparation per acre and 45 kilograms of water are used. If the amount of water is small, the sealing layer of the agent is thin, and some weeds with strong resistance can easily drill the sealing layer, which makes the control effect poor. However, the amount of water should not be too large, otherwise the effective concentration of the agent will be reduced, and the sealing effect will not be achieved.
3. When the above-mentioned closed herbicides are exposed to cotton, peanuts, soybeans and vegetables, they will produce different degrees of phytotoxicity. Therefore, when spraying the above herbicides, the following principles must be followed: spray as much as possible without wind, and strictly prevent the chemicals from accompanying the wind. Drift to vegetables, peanuts and other crops; spray down the nozzle to minimize the drift of the agent; wear a protective cover in front of the nozzle, directed spray.
4. In recent years, due to the poor effect of using closed herbicides on individual plots, some farmers have grown up such as corn and weeds, and then weeded with herbicides such as Yu Nongle and Yuheng. However, it is necessary to remind farmers' friends that the best period of prevention and control is when the corn is 4 to 5 leaves and the weeds are 3 to 4 leaves. If the corn is treated with 7 leaves, it may cause phytotoxicity.
5. Insect pests in corn fields, pesticides can be mixed with herbicides, but when using herbicides Yu Nongle and Yuheng, they should not be mixed with organophosphorus pesticides to avoid phytotoxicity.
Water quality chlorophyll content refers to the concentration of chlorophyll in water. Chlorophyll is a green biopigment that widely exists in plants, algae and some protists and is a key molecule in photosynthesis. The chlorophyll content in the water body can reflect the biomass in the water body and the health of the ecosystem. High chlorophyll content usually indicates eutrophication of the water body and may lead to eutrophication phenomena such as cyanobacterial blooms and hypoxia. The online chlorophyll analyzer adopts the advanced principle of fluorescence method, which can reduce the influence of stray light and has excellent repeatability and stability. RS485 digital interface, supports Modbus protocol, the Chlorophyll Sensor adopts an environmentally friendly design, with an automatic cleaning brush, and the cleaning time and interval can be set on the Chlorophyll Controller. Chlorophyll analyzers are of great significance to the protection of water environments and ecosystems. Daruifuno online chlorophyll meter is used for measuring the chlorophyll a in water, it is widely use for surface water monitoring.
Chlorophyll Analyzer,Chlorophyll Meter,Fluorescence Sensor,Chlorophyll A Sensor
Suzhou Delfino Environmental Technology Co., Ltd. , https://www.daruifuno.com