Fabrication, Characterization, and Insecticidal Activity Evaluation of Emamectin Benzoate–Sodium Lignosulfonate Nanoformulation with pH-Responsivity

By means of high speed emulsification and ultrasonic dispersing, EB-SL nanoformulation (EBSLNf) with particle size of 150-250nm was developed by the electrostatic self-assembly of sodium lignosulfonate and emamectin benzoate. The morphology of the nanoformulation was characterized by UV, IR, DLS, FS, SEM and TEM. The results of anti-photolysis and controlled release test for EBSLNf showed that the anti-photolysis ability of the nanoformulation is 4 times higher than that of commercial EB-EC, and the nanoformulation has a pH-responsive controlled release function. The release ratio in different pH media was acidic > neutral > basic. Moreover, the insecticidal effective duration of EBSLNf was more than 1 time longer than that of EB-SC in greenhouse. Therefore, EBSLNf has broad application prospects in agricultural production and environmental protection due to its easy preparation, low cost and environment-friendely. Thus the strategy is suitable for large-scale industrial production.

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