What are the recent breakthroughs of alkyl polyglucoside in the field of agricultural adjuvants?

2026-03-16 07:36:47

Under the dual drivers of the “Dual Carbon” strategy and the transformation toward green agriculture, Alkyl polyglucoside (APG), a nonionic surfactant synthesized from renewable raw materials, has gradually emerged as a core alternative to traditional petrochemical-based adjuvants, thanks to its excellent biodegradability, low toxicity, and environmental compatibility. In recent years, with iterative upgrades in molecular structure modification and design, compounding technology, and production processes, APG has achieved a series of key breakthroughs in the field of agricultural adjuvants. It has evolved from a single-function efficacy enhancer to a multifunctional integrated solution, and from laboratory research to large-scale application, thereby opening new pathways for improving both the quality and efficiency of agricultural production and for ecological conservation.

1. Breakthroughs in Efficacy Mechanisms: From Surface Action to Targeted Translocation

Traditional agricultural adjuvants mainly enhance performance simply by reducing surface tension, whereas recent innovations in APG’s mechanism of action have enabled a qualitative leap in efficacy. Latest studies show that APG’s synergistic effect with herbicides such as glyphosate is not solely due to its good wetting ability, but also arises from multiple mechanisms that improve active ingredient utilization. On one hand, APG can dissolve and swell the plant cuticular wax layer, disrupt the structure of the cuticle, significantly enhance penetration, and increase solubility in the lipophilic cuticle. More importantly, APG can induce stomatal opening, promoting direct absorption of the active ingredient through the stomata. This unique mechanism greatly improves the translocation efficiency of systemic pesticides; in glyphosate applications, efficacy has increased by more than 30% compared with traditional adjuvants.

In the field of foliar fertilizers, APG’s “sugar shield effect” has become a new technological highlight. Research published in Science in 2025 confirmed that APG can coordinate with trace elements such as Fe²⁺ through its hydroxyl groups, forming helical inclusion complexes. With a unique free radical scavenging capacity (reaction rate constant reaching 3.2×10⁸ M⁻¹·s⁻¹), APG effectively inhibits the oxidation of divalent iron ions, ensuring nutrient stability in foliar fertilizers. Simultaneously, it can reduce solution surface tension to 28.5 mN/m (compared with 72 mN/m for pure water), ensuring uniform spreading of the fertilizer solution on leaf surfaces and enhancing nutrient absorption efficiency, thereby solving the problems of easy oxidation and low absorption rates associated with traditional foliar fertilizers.

2. Innovation in Compounding Systems: Overcoming Compatibility Barriers to Achieve Functional Integration

Insufficient compatibility between APG and pesticides or fertilizers was once the core bottleneck limiting its large-scale application. In recent years, precise design of compounding systems has effectively overcome this issue, resulting in several dedicated composite adjuvants. In herbicide compounding, a newly patented technology uses APG as the core component (50%–75%) compounded with phenethylphenol polyoxyethylene polyoxypropylene ether, dodecyltrimethylammonium chloride, and other ingredients to produce an emulsifier suitable for glufosinate ammonium formulations. This system not only enhances the wetting and penetration of pesticides on plant surfaces but also reduces human health hazards from traditional solvents, meeting the demand for low-toxicity microemulsion formulations, with excellent storage stability and field efficacy.

For complex environments such as saline-alkali soils, APG compounding technology has achieved a breakthrough in salt tolerance. Compounding APG with lignosulfonate at a 3:1 ratio increases pesticide dispersion stability by 40% in high calcium-magnesium ion environments typical of saline-alkali soils, effectively solving the problem of adjuvant failure and agent aggregation in such conditions. In addition, compounding APG with natural products has attracted attention; a plant growth regulator adjuvant made by compounding APG with chitosan enhances the regulator’s translocation efficiency while stimulating crop stress resistance, achieving synergy between efficacy enhancement and stress tolerance.

3. Iterative Production Processes: Green Manufacturing Lowers Costs and Expands Applications

Excessive cost was once the main obstacle to APG’s promotion in agriculture, but breakthroughs in production technology are changing this situation. Traditional acid-catalyzed processes suffered from high energy consumption, numerous by-products, and insufficient product purity. In recent years, enzyme catalysis and continuous-flow microreactor technology have enabled an efficient and green transformation of APG production. A fixed glucose苷 transferase system developed jointly by Jiangnan University and Zanyu Technology can catalyze reactions at 50 °C under atmospheric pressure, with selectivity increased to over 95%, energy consumption reduced by 30%, wastewater COD decreased by 40%, and product hydroxyl value deviation controlled within ±2 mg KOH/g.

A biomass refining integration model at the raw material stage has further lowered costs. COFCO Biotechnology uses sugar liquids from corn starch processing as direct feedstock for APG synthesis, shortening raw material transport distances and reducing lifecycle carbon emissions by another 12%, narrowing the cost gap between APG and traditional petrochemical adjuvants to within 20%. Meanwhile, molecular distillation purification technology has increased product purity to over 99.5%, meeting the stringent standards of high-end pesticide adjuvants, and promoting the extension of APG from low-end aqueous formulations to diversified dosage forms such as suspensions and microcapsules.

4. Expansion of Application Scenarios: From Pesticide Adjuvant to All-Round Adjuvant Across Multiple Fields

APG’s applications have expanded from a single pesticide efficacy enhancer to an all-round adjuvant covering pesticides, fertilizers, and soil improvement. In pesticides, besides herbicides, APG has achieved breakthroughs in fungicide and insecticide formulations. In citrus fungal disease control, APG at 0.2%–0.3% concentration as a fungicide adjuvant can increase control efficacy by 15%–20% without adversely affecting fruit quality. In fertilizers, APG as a dispersant in water-soluble fertilizers improves dissolution speed and uniformity, reduces caking, and when used in drip irrigation systems as a dispersant, it effectively prevents clogging.

In soil improvement, APG’s eco-friendly characteristics are fully leveraged. It can act as a wetting and dispersing adjuvant for soil conditioners, helping them rapidly penetrate deep into the soil, improving soil aggregate structure. Moreover, its degradation products—glucose and fatty alcohols—promote the proliferation of beneficial microorganisms, optimizing the soil microecosystem. Notably, APG has an EC₅₀ > 100 mg/L for aquatic organisms, classifying it as non-acutely toxic, giving it significant advantages in rice and other aquatic crop cultivation, and aligning with ecological agriculture development needs.

5. Challenges and Outlook: Technological Refinement Drives Industrial Upgrading

Despite numerous breakthroughs, APG still faces challenges in agricultural adjuvants: insufficient cloud point under high-temperature conditions, potential phytotoxicity at high concentrations for some crops, and lack of standardization in application technology. In the future, optimizing temperature resistance through molecular structure modification and establishing precise application databases based on crop species will be key R&D focuses. At the policy level, with the upcoming release of the Carbon Footprint Accounting Technical Specification for Biobased Chemicals, APG’s green attributes will gain fuller recognition, helping it overcome international certification barriers.

Amid the wave of green agriculture development, APG, with its renewable and environmentally friendly core advantages and breakthroughs in efficacy mechanisms, compounding technology, and process innovation, is expected to gradually replace traditional petrochemical adjuvants and become a mainstream product in agricultural adjuvants. With continuous technological refinement and growing market awareness, APG will play an increasingly important role in reducing pesticide and fertilizer usage, protecting farmland ecology, and promoting sustainable agricultural development, injecting green momentum into modern agriculture.