Affiliation:
1. College of Chemistry and Pharmacy Qingdao Agricultural University Qingdao China
2. Hailir Pesticides and Chemicals Group Co., Ltd Qingdao China
3. College of Plant Health and Medicine Qingdao Agricultural University Qingdao China
4. College of Chemical Engineering Weifang Vocational College Weifang China
5. College of Horticulture Qingdao Agricultural University Qingdao China
Abstract
AbstractBACKGROUNDControlled‐release pesticide formulations have emerged as a promising approach towards sustainable pest control. Herein, an environment‐friendly formulation of insecticide chlorantraniliprole (CAP) was fabricated through a simple approach of coprecipitation‐based synchronous encapsulation by chitosan (CTS), with carrier–pesticide interaction mechanism and release behavior investigated.RESULTSThe resulting CAP/CTS controlled‐release formulation (CCF) showed a good loading content of 28.1% and a high encapsulation efficiency of 75.6%. Instrument determination in combination with molecular dynamics (MD) simulations displayed that the primary interactions between CAP and CTS were physical adsorption and complicated hydrogen (H)‐bonds, which formed dominantly between NH in amides [or nitrogen (N) in ring structures] of CAP and hydroxyl (or amino) groups of CTS, as well as oxygen (O) in CAP with hydrogen in CTS or H2O molecules. The in vitro release tests exhibited obvious pH/temperature sensitivity, with release dynamics following the first‐order or Ritger–Peppas model. As the temperature increased, the CAP release process of the Ritger–Peppas model changed from Case‐II to anomalous transport, and ultimately to a Fickian diffusion mechanism. The control effect against Plutella xylostella larvae also was evaluated by toxicity tests, where comparable efficacy of CCF to the commercial suspension concentrate was obtained.CONCLUSIONThe innovative, easy‐to‐prepare CCF can be used as a formulation with obvious pH/temperature sensitivity and good efficacy on target pests. This work contributes to the development of efficient and safe pesticide delivery systems, especially using the natural polymer materials as carriers. © 2023 Society of Chemical Industry.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Shandong Province
Subject
Insect Science,Agronomy and Crop Science,General Medicine
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献