1. Overview of agricultural silicone surfactants:
1. Basic introduction of surfactants:
1.1. Pesticides and surfactants: The processing of pesticide preparations is inseparable from surfactants. ) processing must add different types of surfactants. The addition of surfactants greatly reduces the surface tension of the solution, and enhances the wetting, spreading and adhesion of the agent on the surface of plants or pests, thereby improving the efficacy of the drug. The currently used pesticide surfactants mainly include: fatty alcohol polyoxyethylenes, alkylphenol polyoxyethylene ethers, sulfonates, sulfonates, amides, silicones, etc. Pesticide surfactant itself has no insecticidal and bactericidal effects, but its emulsification and spreading properties will affect the efficacy of pesticides. At present, the main difference between domestic formulations with the same active ingredients and content and the formulations of multinational companies lies in the application of surfactants in formulations, such as: the difference in the weeding effect of domestic 41% water formulations and Roundup, domestic 40% The difference in the insecticidal effect between chlorpyrifos and Dow's Lespont is due to the difference in the added surfactants.
1.2. Application of pesticide surfactants: Pesticide surfactants can usually be added to pesticide properties in two ways. One is that it is directly mixed with the original pesticide to form a dosage form product. The other is that it can be mixed and used in the field as a tank mixing aid. At present, there are many types of adjuvants that are directly mixed with pesticides, and the applications are not introduced here. The second type is agricultural surfactants that are mixed and used now. There are two types on the market: the first type: agricultural adjuvants with penetrating functions mainly composed of genthilon and azone. The representative company is Henan Xinxiang Gaojin Pharmaceutical Co., Ltd.'s several products: diamond, gold powder, silver powder, and fungicide. The second category: organosilicon agricultural surfactants compounded with modified polytrisiloxane (such as: Fairland 2408, Silwet 408, B-204, S-309) as the main component. Compared with the current mixed additives such as Gaogenthinone, it not only has good permeability, but also has good spreadability.

2. Application and market promotion of silicone surfactants in agriculture
2.1. Characteristics of agricultural silicone surfactants:
Silicone additives have good spreadability and permeability due to their good agricultural silicone additives. In the process of pesticide spraying, it has the characteristics of synergistic, labor-saving, water-saving and chemical-saving. Silicone agricultural spray adjuvants can not only help increase yields, but also reduce the adverse impact of pesticides on the environment. It can make the sprayed agrochemicals work better, spread easier, absorb faster and not easily washed off, and has "rain wash resistance". Specifically, these additives make it easier for solutions containing pesticides, growth regulators and other chemicals to penetrate plant surfaces. This spreading ability means that only a small amount of spray is needed to achieve the desired spray effect. Save up to 50% of water when spraying pesticides. This not only reduces waste, but also reduces the amount of pesticides lost to soil and groundwater, which in turn reduces pesticide residues in the environment. It has the following characteristics in prevention and control:
1. Effective mixing can improve the effect of various pesticides on older larvae.
2. It can directly reach the body of the pest through the stomata of the pest, and can reach the body of the pest through the stomata on the surface of the pest under the condition of low tension, correspondingly improving the efficacy of some contact pesticides.
3. Good spreadability, which can improve the utilization rate of pesticides and effectively reduce the number of labor.
4. When controlling rice planthoppers and orchard pests, the tension can effectively spread the pesticide to the base of the rice bushes and the back of the leaves that have not been sprayed with pesticides, etc., which are difficult to spray.
5. The low expansibility can promote the direct diffusion of systemic fungicides and herbicides into the mesophyll tissue of plants through the stomata of plant leaves, and play a good role in auxiliary absorption.
6. Good compatibility, can be mixed with a variety of pesticides (insecticides, fungicides, herbicides, foliar fertilizers, biological fertilizers).
7. It is very easy to hydrolyze, and it must be sprayed within 4 hours after being prepared as a liquid medicine.
2.2. Application of agricultural silicone surfactants:
It stands to reason that surfactants are directly processed into formulations with pesticide raw materials, which can save packaging materials and save time and effort. Why not directly process silicone additives and pesticide raw materials into pesticide preparations? As far as the current technical situation is concerned, because silicone surfactants are easily decomposed under acidic and alkaline conditions, the silicone surface activity can only be guaranteed when the pH value of the pesticide preparation is directly between 6.0-8.0 The agent will not decompose. (For example: PH index of 41% glyphosate solution is between 4.0-8.0)
Therefore, we have heard more information about the mixing and current use of agricultural silicone surfactants. However, it is not ruled out that the agricultural silicone surfactant can be processed into a pesticide active drug. The application of agricultural silicone surfactants is as follows:
1. Directly processed into preparations with pesticide raw materials.
As mentioned above, when the pH is within the range of 6.0-8.0, the organic silicon additives can be processed into preparations with the original pesticides. Some formulation manufacturers have tried to add silicone additives to emulsifiable concentrate formulations and achieved initial success.
2. Mixed spraying with pesticide formulation products on the ground (mixed and used now).
Due to the characteristics of agricultural silicone additives, the mixed use of agricultural silicone surfactants in the field is becoming more and more popular in China. According to a sample survey in the Zhejiang market, according to the owner of a retail store in Hecun, Quzhou: When rice planthoppers broke out this year, when farmers reported that the effect of single-use agricultural chemicals was not good, they recommended the use of agricultural silicone additives and achieved good results. . Similar voices have also received feedback from the owner of Baihe Agricultural Materials in Longquan, Lishui. It can be seen that silicone agricultural surfactants have been approved by terminal farmers and distributors.
3. Market Analysis of Agricultural Silicones
The corresponding advantages of organic silicon additives determine that it has great development prospects in China, especially when used in fruit areas, rice areas, vegetable areas and other bulk crops, and has great development prospects for preventing and controlling diseases, insects, and weeds. .
1. Agricultural silicone can effectively solve the problem of pesticide residues in vegetable and fruit areas:
At present, one of the major obstacles facing my country's fruit and vegetable export trade is the problem of pesticide residues. In my country, due to factors such as education level and traditional use habits, farmers tend to spray high concentrations and high spray volumes when spraying pesticides, and the residue problem is more prominent. The lost pesticides will also damage the surrounding soil environment and groundwater environment, forming a vicious circle. However, the inspection standards for pesticide residues in the world are constantly improving, especially in some developed countries such as the United States and Japan, which pay great attention to food safety issues. Therefore, reducing pesticide residues has become an urgent problem to be solved. my country's southeast coast, Jiaozhou Peninsula and other important vegetable and fruit producing areas have a very large demand for such products. The application of silicone additives can promote the rational use of pesticides, reduce pesticide residues, and improve the quality of fruits and vegetables.
2. Save water and reduce labor intensity:
Tests have proved that organic silicon agricultural spray additives can help save up to 70% of water. If they can be effectively promoted, they will undoubtedly alleviate the increasingly tense water resources in our country. Compared with traditional adjuvants, silicone agricultural spray adjuvants have good penetration effect, and a small amount of spray can achieve the desired effect, thus saving costs and reducing the labor of farmers, especially in the vast arid areas of northern China , the application prospect is broad. `
3. It has a certain synergistic effect and can effectively reduce the amount of pesticides:
FAIRLAND agricultural silicone spray adjuvant is a kind of organic silicon adjuvant, which is widely used in pesticides. It does not decompose the original drug, has ultra-low surface tension and super expansion ability (the expansion ability is more than 9 times that of pure water) ), which can well enhance the penetration and coverage of the liquid on the surface of plants and insects, thereby improving the efficacy of the medicine; in addition, it can also enhance the ability of the medicine to resist rain erosion. In this way, the amount of pesticides is correspondingly reduced. It is even more effective when some pests break out.


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