Many farmers' friends always complain that the herbicides they buy are not very effective. In fact, the efficacy of herbicides is not only related to their own ingredients, but also many external objective factors will affect the efficacy of herbicides. Just follow the small series to find out. Temperature The high temperature is conducive to the herbicide being absorbed by the weeds, and the effect is good. But not the higher the temperature, the better, the temperature is too high, the sprayed mist is quickly evaporated, especially for some volatile herbicides and photolysis-decomposing herbicides, which will reduce the herbicidal effect, such as 2.4-D, fluorine Leling, Heda Zhuang, Methoc tetrachloride, etc., will also cause phytotoxicity due to volatilization and drift to sensitive crops around. When the temperature is too low, the grass is used, and the plant can not be degraded in time, which is prone to phytotoxicity. The correct application should be: high temperature season, sunny and windless before 11 am and after 4 pm; low temperature season should be between 10 am and 3 pm. 2. Air humidity In general, the high humidity is beneficial to the herbicide being absorbed by the weeds, and the effect is good. The best time is that there is no dew on the leaves, no rain, and the air humidity is above 60%. Do not apply if the dry heat season is too dry. 3. Soil moisture Adequate soil moisture, strong growth of crops and weeds, is conducive to the decomposition of pesticides and the absorption of pesticides by the crops and transported in the body, so as to achieve the best herbicidal effect, especially the soil treatment agent must have soil moist conditions to play. Good efficacy. If the soil is dry, the crops and weeds grow slowly, the crop tolerance is poor, and the weed stems and leaves form a thicker stratum corneum, which affects the absorption and conduction of the herbicide, thereby reducing the efficacy of the herbicide. At the same time, in order to adapt to the arid environment, most of the pores are closed, which affects the absorption of the medicament, and the root system is more developed, which increases the difficulty of prevention. Therefore, in the dry weather, high limit is recommended, and the amount of water spray should be increased at the same time. 4. Precipitation Rain soon after application, the liquid is easily washed away, affecting the efficacy. 5. Lighting Paraquat, herbicide ether, and accompanying farmer are all photoactivated herbicides, which only kill grass under the action of light. Photosynthetic inhibitors such as simazine, diuron, and chlorpyrifos also need to inhibit the photosynthesis of weeds in the presence of light and exert herbicidal effects. Fluorin and other applied to the soil surface is volatile, easy to decompose when light is used, and it should be mixed with the topsoil in time. 6 soil pH When the pH is between 5.5 and 7.5, most of the herbicides can work well. The soil with ACID and alkali can decompose some herbicides, thus affecting the efficacy. For example, the soil-blocking herbicide is acidic. The herbicidal effect in the saline-alkali soil is poor or even ineffective. For example, the bio-sulfuron degradation rate in acid soil is fast, affecting the drug effect, and the degradation rate is slow in alkaline soil, which is easy to cause phytotoxicity to the susceptible crop. 7. Soil texture and organic matter content Soils with loose texture and low organic matter have low adsorption capacity, and excessive amounts are easily leached to cause damage to crop roots. The soil with high content of cohesive soil and organic matter has strong adsorption capacity, so that the liquid can not move in the soil solution to form a uniform soil layer, which may cause the phenomenon of “unable to seal†and affect the effect. Therefore, the dosage should be appropriately increased, or Recommended usage limit. Herbicides are generally not used in soils with high organic matter and high water fertility. 8. Water quality Refers to the hardness and pH of the water that is applied during the application. Hardness refers to the amount of Ca2+ and Mg2+ ions contained in 100 ml of water. Since the active ingredients of some herbicides are easily fixed by complexing the two ions to form a salt, the hardness of the water may reduce the efficacy of the herbicide. Pesticides with acid-base are mixed with water with higher basicity or higher acidity, which will affect the stability of the agent and thus reduce the herbicidal effect. 9. Wind speed Herbicides should be applied in the absence of wind or breeze. Wind-dried herbicides are prone to mist drift and harm sensitive surrounding crops. Especially volatile herbicides should be used with special care. 10. Grass age Weeds are the best control period in the 2-3 leaf stage. The weeds are too old and the resistance is increased, and the dosage must be increased. More herbicides, please pay attention to pesticide network
Chrome Yellow has high bright yellow pigment, and high hiding powder, well tinting strength, heat-resistance,etc advantages, non-toxic, etc.
Usage:
1. Used in kinds of paints, including water-soluble paint for outside and inside wall, and oil paint including kinds of first coat and face coat such as epoxy, alkyd, amine etc.
2. Used in coloration for construction materials, i.e. mosaic brick, levigation level ground, concrete production, brick for pavement, colorful tiles and man-made marble, etc.
3. Used in coloration for colorful paper.
4. Used in surface coloration for rubber production, and strengthen the abrasion resistance of rubber filling.
5. Used in coloration for plastics, which is harder to fade.
6. Used in detecting the damage degree of machine by its magnetism.
Chrome Yellow Chrome Yellow,Chrome Yellow Pigment,Chrome Yellow Color,Middle Chrome Yellow Yucheng Jinhe Industrial Co.,Ltd , https://www.jinhetec.com