1. Herbicides should be selected according to the grass phase, and the proper application period and usage amount should be strictly controlled, and even spraying should be done to prevent re-spray and leakage. When applying pesticides, pay attention to soil moisture, especially the use of pre-emergent soil treatment agents. Generally, after the rain, when the soil is wet, the effect is good. If the soil is dry, the amount of water in the mu can be increased to 60 liters, or it can be used after being irrigated to improve the weeding effect. In the event of drought, drought should be applied first and then applied.
2. The use of oxazolyoxime is strictly prohibited in barley fields; in the case of hypertonic isoproturon, we must pay attention to the influence of cold waves in the wheat field weeds, and apply pesticides in cold tail warmers to avoid phytotoxicity.
3. The herbicide and its compound preparation should not be used in the rapeseed field of cabbage and mustard, and it should be used when the temperature is above 8°C.
4. To adhere to the principle of “testing, demonstration, and promotion†for new varieties of herbicides, it is forbidden to use herbicides without “three certificatesâ€. For the varieties of herbicides that have not been used in the local area or have not been used on the recommended crops, trials and demonstrations should be carried out first. Before the application technology is mature, it must not be widely promoted in a blind manner to avoid phytotoxicity.
5. Stop using long-lasting herbicides that have a greater impact on the growth of post-plants. Herbicides containing metsulfuron and chlorsulfuron are not recommended in wheat fields. It is not recommended to use herbicides containing azulfuron-methyl in rapeseed fields in order to avoid phytotoxicity on post-plant crops.
In addition, prevention and control of pests and diseases at seedling stage can effectively control the spread of viral diseases. Rapeseed seedlings have pod strains of 3% to 5% or more than 10% of pods after transplanting. In the areas of rice black-streaked dwarf disease, striped blight, and maize virus disease, wintering planthopper prevention and control should be done. Combining with chemical weeding, the use of 25% pymetrozine wettable powder 30 grams per mu should be used for both disease and disease control.
There are many kinds of raw materials and different properties of cosmetics. According to the properties and uses of raw materials, cosmetics can be generally divided into two categories: substrate raw materials and auxiliary raw materials.
The former is a kind of main raw material of cosmetics, which occupies a large proportion in the formula of cosmetics, and is the substance that plays the main function in cosmetics. The latter are responsible for forming, stabilizing or giving color, fragrance and other properties of cosmetics, which are used in small amounts in cosmetic formulations but are extremely important. Cosmetics are chemical mixtures made from natural, synthetic or extracted substances with different functions, which are processed by heating, stirring and emulsifying.
Cosmetic Ingredients ,Sodium Hyaluronate Powder,Kojic Acid Dipalmitate,Ursolic Acid Powder
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