In order to prolong the residue activity for root-knot nematode, abamectin was coated by a polyurethane film through an interfacial polymerization microencapsulation processes. The polyurethane film was made by reacting polymethylene polyphenyl isocyanate (PAPI) and triethanolamine. Scanning electron microscopy (SEM) and focused ion beam (FIB) were used for characterization of morphology of abamectin-loaded microcapsules. The cross section of the polyurethane microcapsule was first showed and the core-shell structure of microcapsules was clearly observed in this paper. Fourier transform infrared spectra (FT-IR) and thermogravimetric analysis (TGA) were used to detect the composition of the microcapsule. Furthermore, the encapsulation efficiency (EE) and loading content (LC) of abamectin-loaded microcapsules were determined by high-performance liquid chromatography (HPLC). The abamectin release behavior in water was also investigated and the bioassay experiment showed that abamectin-loaded microcapsules have effective root-knot nematicidal activity in tomatoes. The idea and approach presented in this work have potential application in the pesticide industry.

Preparation and characterization of abamectin-loaded microcapsules by interfacial polymerization for nematicidal application

248th National Meeting (2014)

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