In current agricultural practice, especially in the fields of nanotechnology and biosynthesis, breakthroughs have further expanded its potential. Through scientific storage, rational mixing, and standardized operation, the auxiliary effects of silica in pesticides can be maximized while reducing potential risks.
1、 Physical performance optimization
1. Anti caking and improved dispersibility
① As an anti caking agent, it prevents pesticide particles from clumping, ensuring uniform distribution and effective release.
② Improve the suspension and stability of pesticides through nanoscale particles (such as 10-50nm).
2. Efficiency enhancing and slow-release functions
① As a carrier material (such as mesoporous silica), it can load pesticide active ingredients, achieve sustained release effect, and reduce the frequency of pesticide application.
② Enhance the adhesion of pesticides on plant surfaces and reduce runoff caused by rainwater erosion. Chemical inertness makes it less likely to react with pesticides, ensuring drug stability.
3. Optimize the application effect
① Nano silica can be used as a pesticide carrier to accurately deliver active ingredients to target areas.
② By adjusting the opening and closing of stomata and the surface characteristics of leaves, it promotes the uniform distribution of pesticides on plant surfaces and improves infiltration efficiency.
2、 Ecological and safety advantages
① Chemical inertness makes it less likely to react with pesticides, ensuring drug stability.
② By using physical barriers, some pests can partially prevent direct damage to plants, indirectly reducing pesticide dependence
Ecological and safety advantages
3、 Applicable to pesticide categories
1. Insecticides
① Organic phosphorus
Methyl pyrimidine phosphate: achieved sustained release through silica microcapsules, with a drug loading of 62.18% and an encapsulation efficiency of over 92%.
Efficient Chlorfenapyr: Combined with mesoporous silica nanoparticles, it enhances insecticidal activity and biosafety.
② Low toxicity insecticide
Amorphous silica: mainly composed of amorphous silica, used for controlling storage pests and has low toxicity to mammals.
2. Fungicides
① Propiconazole: loaded onto silica nanoparticles (MSNs), prolongs shelf life and reduces environmental toxicity.
3. Nano pesticide carrier
① Mesoporous silica nanoparticles (MSNs): widely used in pesticide slow-release systems, such as corn zein grafted MSNs, which can improve the performance of chlorpyrifos.
② One step green microcapsule: Using tetraethyl orthosilicate (TEOS) as raw material, pesticide loaded silica microcapsules were prepared to achieve 16 day sustained release.
4. Other forms of application
① Anti caking agent: used in traditional dosage forms such as powders and wettable powders to prevent pesticide particles from clumping (such as some emulsion formulations). ‌
② Stability: Chemical inertness makes it less likely to react with pesticides, ensuring drug stability.
4、 Technological application advantages
1. Reduce pesticide usage: Nano silica can reduce pesticide usage by 30% -50% while maintaining or enhancing efficacy.
2. Formulation adaptability: Suitable for various formulations such as wettable powders and suspensions, improving the limitations of traditional pesticides.
5、 Market and Technology Trends
1. Patent layout acceleration: China's patent application volume in the field of mesoporous silica pesticide carriers has increased by 15% annually, and functionality has become a research and development hotspot.
2. Market size growth: The global demand for silica used in pesticides continues to rise with the popularization of nanomaterials. The market size of precipitated silica is expected to reach 29.5 billion yuan by 2029, with agricultural chemicals being the main growth point.
In the future, the application trend of silica in pesticides shows that the application of silica in pesticides is developing from physical additives to multifunctional nanocarriers, especially in the fields of reduction, efficiency improvement, and green synthesis, further promoting the green transformation of agriculture.