As people's requirements for pesticides have increased, something called pesticide additives has emerged. Pesticide additives are auxiliary substances added to the processing or use of pesticide preparations and used to improve the physical and chemical properties of pharmaceuticals, also known as pesticide adjuvants. The auxiliaries themselves are essentially free of biological activity, but can affect the control effect.
There are many varieties of pesticides, different physical and chemical properties, and different processing requirements for the dosage forms, so the additives required are also different.
Filler or carrier
A solid inert mineral, plant or synthetic material added to a solid pesticide formulation for the purpose of adjusting the finished product content or improving the physical state. Commonly used are attapulgite, diatomaceous earth, kaolin, clay and the like. Its role is to dilute the original drug , and the second is to adsorb the original drug. Mainly used in the production of powders, wettable powders, granules, water-dispersible granules, etc.
2. Solvent
An organic substance used to dissolve and dilute the active ingredients of pesticides, making them easy to process and use. Commonly used are xylene, toluene, benzene and the like. Used for processing emulsifiable concentrates. It requires strong dissolving power, low toxicity, high flash point, non-flammability, low cost and wide source.
3. Emulsifier
For two-phase liquids (such as oil and water) that are originally incompatible, one of the liquids can be stably dispersed in another phase liquid with a very small liquid bead to form an opaque or translucent emulsion. The surfactant is called an emulsifier. Such as calcium dodecylbenzene sulfonate. Used for processing emulsifiable concentrates, water emulsions and microemulsions.
4. Wetting agent
Also known as wet spread agents, are a class of surfactants that significantly reduce the tension of the liquid-solid interface, increase the contact of the liquid with the solid surface, or increase the wetting and spreading of the solid surface. Such as saponin, sodium lauryl sulfate, pull powder and so on. It is mainly used for the processing of wettable powders, water-dispersible granules, liquid preparations and aqueous suspensions and as a spray aid.
5. Dispersant
In the processing of the pesticide preparation, the solid particles in the solid-liquid dispersion system can be prevented from aggregating, and the surfactant which is uniformly dispersed in the liquid phase for a long period of time can be prevented. Such as sodium lignin sulfonate, NNO and so on. Mainly used in the processing of wettable powders, water-dispersible granules, and water suspensions.
6. Penetrant
A surfactant capable of promoting the active ingredient of a pesticide into a treated object such as a plant or a pest, and is generally used for formulating a hypertonic pesticide preparation product. Such as penetrant T, fatty alcohol polyoxyethylene ether and the like.
7. Adhesive
An additive that increases the adhesion of pesticides to solid surfaces. It is resistant to rainwater rinsing due to improved adhesion of the drug and improves its effectiveness. For example, adding a proper amount of mineral oil with a large amount of viscosity to the powder, and adding an appropriate amount of starch paste, gelatin, etc. to the liquid pesticide.
8. Stabilizer
There are two types: one can inhibit or slow down the decomposition of active ingredients of pesticides, such as antioxidants, anti-photolysis agents, etc.; the other can improve the physical stability of preparations, such as anti-caking agents and anti-settling agents.
9. Synergist
A compound that is biologically inactive but inhibits detoxification enzymes in living organisms and can greatly improve the virulence and efficacy of pesticides when mixed with certain pesticides. Such as synergistic phosphorus, synergistic ether and so on. It is of great significance for controlling and controlling resistant pests, delaying drug resistance and improving control effects.
10. Safety agent
Compounds that reduce or eliminate herbicide damage to crops can improve the safety of herbicides.
In addition, there are additives such as foaming agents, antifoaming agents, antifreeze agents, preservatives, and warning colors.
More pesticide knowledge , please pay attention to China Pesticide Network
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