Study of Encapsulation Efficiency of Isothiocyanates in Clay Carriers for Potato Cyst Nematode Control

Complexes based on isothiocyanates (ITCs) (allyl isothiocyanate (AITC), benzyl isothiocyanate (BITC) and 2-phenylethyl isothiocyanate (PEITC)) and clay carriers (montmorillonite (MMT) and bentonite) were prepared and studied. Bentonite-based complexes were chosen for the further in vitro ITC release study. Adsorption of ITCs into clay layers allowed to prolong their release, preventing early evaporation and degradation, which was confirmed in the experiments with release into dodecane and the soil. Moreover, encapsulation allows to reduce the negative effect on the soil microflora, which is important for use in agriculture as a nematicidal preparation.

本研究制备并研究了基于异硫氰酸酯（isothiocyanates，ITCs）的复合物，所涉异硫氰酸酯包括异硫氰酸烯丙酯（allyl isothiocyanate，AITC）、异硫氰酸苄酯（benzyl isothiocyanate，BITC）与异硫氰酸苯乙酯（2-phenylethyl isothiocyanate，PEITC），载体则涵盖蒙脱石（montmorillonite，MMT）与膨润土。后续研究选取膨润土基复合物开展体外ITCs释放实验。结果表明，将ITCs吸附至黏土层中可延长其释放周期，避免早期挥发与降解，该结论通过在十二烷与土壤中开展的释放实验得到验证。此外，该包埋方式可降低对土壤微生物区系的负面影响，这对于将其作为杀线虫制剂应用于农业生产具有重要意义。