Let's first understand what silicone is
Silicone adjuvant is a highly efficient and environmentally friendly non-ionic surfactant. Its application has brought fundamental changes to the formulation and application technology of pesticides. Due to its good wettability, expansibility, permeability and compatibility, and its foaming, foam stabilizing and foam suppressing effects, it can significantly improve the utilization rate and application effect in chemical control, and reduce the amount of pesticides used by 30%-50% %, effectively reduce pesticide residues, save water, reduce labor intensity, reduce pesticides and increase efficiency, and have been widely used in agricultural production. Today, we will explain the characteristics, applications, and usage methods of silicone additives, hoping to help farmers understand silicone additives and use them reasonably to reduce agricultural production costs and improve efficacy.
Features of silicone additives
Silicone additives mainly include the following three aspects of excellent performance: wettability, expansion and permeability.
1. Good wettability
Plant leaves, stems, and insect epidermis often have anti-wetting components or structures, and the leaf surfaces often have negative charges, which have a repelling effect on pesticide liquids. Generally speaking, when the surface tension of the spray liquid is lower than the surface tension of the leaves, the spray liquid will absorb and wet the plant surface; otherwise, the spray liquid will shrink and gather on the plant surface, and the droplets sprayed on the surface of the target object will roll down . The surface tension of organic silicon additives is extremely low, which can easily wet almost all kinds of plant leaves and insect skin, greatly improving the coverage and contact surface of target organisms, reducing the loss of pesticides and improving their utilization efficiency.
2. Super scalability
Silicone additives have super expansion performance. After adding additives, the expansion area is more than 10 times that of pure water. Make the medicine enter the pest hidden in the back of the leaf or in the gap of the fruit tree, so that the medicine liquid can directly contact or even kill the harmful organism.
3. Good permeability
Stomata are one of the main ways for medicine to enter the plant body. Silicone additives can effectively promote the penetration of medicine liquid into the epidermis through the stomata, and the absorption speed is very fast. Studies have reported that silicone additives have a good synergistic effect on abamectin, mainly reflected in the fact that it can make the liquid enter the microscopic pest hiding places, and secondly, it is absorbed by the leaves and enters the skin of the fabric, prolonging the life of the agent. The residual effect period is longer than that brought by the use of mineral oil additives.
Application of organosilicon additives in pesticides
Silicone adjuvants are used in pesticides, and can be used as Spray adjuvants, wetting adjuvants, surfactants, etc., in herbicides, foliar fertilizers, insecticides or growth regulators.
1. Application in herbicides Organic silicon is added to pesticides, and after spraying on the surface of weed stems and leaves, the liquid quickly passes through the cuticle and cytoplasmic membrane, and finally transmits to various parts of the plant. After the weeds are injured, the stems and leaves will be twisted, deformed, and eventually die, which can significantly speed up the weeding speed and improve the control effect, and at the same time can greatly reduce water use and save labor.
2. Application of foliar fertilizer Foliar fertilizer is a fast and efficient way to replenish nutrients, but the impermeability of plant epidermis to inorganic nutrient ions is very unfavorable for foliar fertilization, so fertilization through stomata can be regarded as a A good way, organic silicon additives can promote the absorption of fabrics through pore penetration, and improve the utilization rate of fertilizers.
3. Application in growth regulators Silicone surfactants can reduce the usage amount and improve the usage effect. For example, gibberellin is widely used in citrus, but it is easy to produce antagonism with citrus. The application of agricultural silicone additives can greatly improve the efficacy of gibberellin, and the amount of gibberellin can also be reduced to 1/10
4. Application in insecticides and acaricides The stomata of insects are very similar to the stomata of leaves. Silicone surfactants can reduce the surface tension of the solution, allowing the liquid to penetrate into the trachea of insects, making them dead. It is of great significance as an insecticide auxiliary and synergist.
What situation is suitable for adding silicone additives?
When using silicone, there are a few points to pay special attention to.
1. Ready-to-use, ready-to-use liquid medicine as soon as possible.
2. Reduce the water consumption of spraying, and speed up the walking speed of spraying properly. The amount of spray is appropriate to form a water film but not to form water droplets.
3. When spraying, wear protective equipment according to the requirements of using pesticides, and pay special attention to the protection of eyes.
4. It is not recommended to add organic silicon to certain phytotoxicity-prone substances such as flusilazole, epoxiconazole, fluazinam, propargid, fenbutatin, etc.
5. It is best to apply pesticides before 10:00 am and after 4:00 pm to avoid high temperature application. Strictly follow the multiple dilution of more than 3000 times.
