Fabricated chlorantraniliprole loaded chitosan/alginate hydrogel rings effectively control Spodoptera frugiperda in maize ears. (May 2021)

• Record Type: Journal Article
• Authors: Yang, Liupeng; Song, Zixia; Li, Chao; Huang, Suqing; Cheng, Dongmei; Zhang, Zhixiang
• Is Part Of: Crop protection. Volume 143(2021)
• Publication Date: 2021-05
• Subjects: Chlorantraniliprole -- Spodoptera frugiperda -- Chitosan-alginate -- Maize -- Transfer efficiency -- Insecticide efficacy; Plants, Protection of -- Periodicals; 632.05
• DOI: 10.1016/j.cropro.2021.105539
• Languages: English
• ISSNs: 0261-2194

Abstract

Abstract: Damage to the growing ears by Spodoptera frugiperda is a major economic burden, therefore, the development of a novel targeted treatment with safe, environmentally friendly, and effective is necessary to control the damage of S. frugiperda in maize ears. In this study, chitosan/sodium alginate hydrogel rings loaded with chlorantraniliprole (CLAP) were prepared by physical embedding and ionic cross-linking method. The CLAP-loaded hydrogel rings were evaluated for their morphology, loading efficiency, encapsulation efficiency, and release kinetics at different pH levels. The efficacy of the CLAP-loaded hydrogel rings and CLAP suspension were evaluated under field conditions for control of S. frugiperda in maize ears, and the distribution and dissipation of CLAP on maize ears were investigated. The results of the two-year trial showed that the insecticidal effects of the CLAP-loaded hydrogel rings treatment were significantly improved contrasted with the use of CLAP suspension, and increased the transfer efficiency of the pesticide from maize bracts to maize kernels. The terminal residues showed that it is safe to use CLAP suspension and CLAP-loaded hydrogel rings on maize ears. This study provides guidance for the use of pesticides to control pests in maize ears in rainfall-rich areas. Graphical abstract: Fabricated chlorantraniliprole loaded chitosan/alginate hydrogel rings effectively control Spodoptera frugiperda in maizes ears . Image 1 Highlights: An environmentally friendly slow-release system was developed for the control of Spodoptera frugiperda on maize ears. The application of chlorantraniliprole-loaded hydrogel rings resulted in a longer persistence of the pesticide. The hydrogel rings improved the transfer efficiency of pesticide transfer from maize bracts to maize kernels. The hydrogel rings reduce the drift of pesticides during the spraying process and reduce the impact on the environment.