Low-temperature resistant and freeze-resistant agricultural silicone oil additive successfully developed, solving the problem of agricultural protection in northern regions during autumn and winter. 

1.The low-temperature environment in the north restricts the normal application of silicone oil additives. 
In the northern regions of our country, pest control operations for wheat, fruit trees, and greenhouse vegetables are frequent during autumn and winter. When the temperature is low, ordinary agricultural silicone oil is prone to solidification and stratification, losing its wetting and spreading effect. In low-temperature conditions, the fluidity of the pesticide solution deteriorates, making it easy for the unmanned aircraft to clog the spray nozzles. Ground spraying results in poor adhesion of the pesticide solution. After spraying during cold and rainy snowy weather, the pesticide is severely lost, greatly reducing the effectiveness of disease and pest control. There has been a long-term lack of special silicone oil additives specifically designed for low-temperature conditions. 

2. Modified silicon oxide structure at low temperatures, maintaining stable liquid state even at extremely low temperatures. 
The freeze-resistant agricultural silicone oil additive developed this time adjusts the structure of the silicon-oxygen side chain, eliminates the use of high freezing-point additives, and remains fluid even after standing at -10℃ for 72 hours without solidification or stratification. The fluidity is not affected by low temperatures. When mixed in a low-temperature barrel, it can quickly blend with pesticides and water-soluble fertilizers without generating flocculent substances that would block the spray pipeline. At the same time, it retains its excellent ability to reduce surface tension, and can still evenly spread on the leaf surface even under low-temperature and high-humidity conditions. 

3. Autumn and winter field experiments in many areas of the north have demonstrated remarkable effects in preventing frost damage and enhancing efficiency. 
A comparative experiment was conducted on winter wheat and apple orchards in North China and Northeast China. When spraying the corresponding agents under low-temperature and frosty weather conditions, the adhesion amount of the drug solution increased by 38% after adding the frost-resistant silicone oil additive. The anti-freezing erosion ability was enhanced, and the disease and pest control effect during the low-temperature period increased by more than 30%. When used in a low-temperature and high-humidity environment in greenhouses, it will not aggravate the gray mold disease caused by leaf condensation. Both fruit seedlings and overwintering crops can be safely used without any freezing injury or drug damage problems. 

4. Improve the all-season additive system and address the shortcomings of agricultural products in the north. 
This freeze-resistant silicone oil additive does not need to be used together with antifreeze. It simplifies the medication process for farmers and comes in both large and small packaging options, suitable for individual farmers, large-scale planting bases, and aerial spraying teams. The product is low in carbon and solvents, meeting the requirements of the northern green agriculture promotion. It fills the gap in the domestic market for special agricultural silicone oil for low temperatures and achieves full coverage of pest control additives throughout the year, from spring to autumn and winter.