Chitosan-Delivered Chlorantraniliprole for Pest Control: Preparation Optimization, Deposition Behavior, and Application Potential

Abstract

Chitosan has emerged as a promising biopolymer carrier for the sustained release of pesticides owing to its good biocompatibility, biodegradability, and bioactivity. In this work, a controlled-release formulation of insecticide chlorantraniliprole was fabricated through coprecipitation-based synchronous encapsulation with chitosan, where the optimum preparation conditions, storage stability, deposition behavior, and application potential were investigated. Preparation of optimization data from response surface methodology showed high correlation coefficient (R 2) of 0.9875 and adjusted coefficient (R adj 2) of 0.9715. The resulting formulation displayed good loading content of 28.39%, high encapsulation efficiency of 75.71%, and good storage stability. Compared with the commercial suspension concentrate, the formulation exhibited better wettability and retention behaviors on plant leaves. Excitingly, effective control against one species of mealybug genus Paraputo Laing (outside the killing spectrum) on the Hippeastrum reticulatum plant was successfully achieved by spraying the controlled-release formulation at different time intervals. This work indicates the good potential of the developed formulation in expanding the application scope of chlorantraniliprole, which shows a new strategy for sustainable pest management.

Molecular simulation of CO production and adsorption in a coal–kaolinite composite gangue slit model

“…At present, the research on coal gangue index gas focuses on macroscopic experimental analysis and molecular simulation methods that simply replace coal gangue with kaolinite, which makes it difficult to accurately analyze the mechanism of CO index gas production and adsorption at the microscopic level. 5,6 Therefore, it is of great practical signicance to comprehensively study the microscopic mechanism of CO production by coal gangue using a new composite macromolecular model.…”