Using a reactive emulsifier to construct simple and convenient nanocapsules loaded with lambda-cyhalothrin to achieve efficient foliar delivery and insecticidal synergies. Issue 37 (17th September 2021)

• Record Type: Journal Article
• Authors: Luo, Jian; Gao, Yue; Liu, Yukun; Du, Jiang; Zhang, Da-xia; Cao, Haichao; Jing, Tongfang; Li, Bei-xing; Liu, Feng
• Is Part Of: Nanoscale. Volume 13:Issue 37(2021)
• Page Start: 15647
• Page End: 15658
• Publication Date: 2021-09-17
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d1nr04381a
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : A simple and efficient insecticide polymer nanocapsule was developed based on a reactive emulsifier. High target contact efficiency contributed to the dosage reduction and synergism. Rain-washing and UV resistance provided a longer efficacy period. Abstract : Nanocapsules are a promising controlled release formulation for foliar pest control. However, the complicated process and high cost limit widespread use in agriculture, so a simpler and more convenient preparation system is urgently needed. Meanwhile, under complex field conditions, the advantageous mechanism of the nanosize effect and sustained release have no quantitative and detailed study. In this study, a reactive emulsifier (OP-10) is used to participate in the interfacial polymerization of the nanoemulsion, and polymer nanocapsules loaded with lambda-cyhalothrin (NCS@LC) are quickly and easily prepared to study the efficacy and synergistic mechanism of foliar pest control. As a result, the nanocapsule is about 150 nm with a stable core–shell structure. The nanoscale state increases the distribution and adhesion of the particles on the leaf surface, which increases the contact efficiency of pesticides under the different physiological stages and behavioral activities of the target organism. The shell structure provides sustained release characteristics and increases the UV resistance by about 2.5 times for pesticides. Compared with microcapsules loaded with lambda-cyhalothrin (CS@LC), NCS@LC not only shows rapid and synergistic insecticidal efficacy but also provides sustained insecticidal efficacy. The mortality of NCS is 3.4 times that of the nanosized emulsion in water (NEW) at the lowest concentration (0.5 mg L −1 ), and the control efficacy remained 77.3% after 7 days. Compared with NEW, NCS@LC provides excellent field efficacy, while LC50 for zebrafish is only 0.68 times without increasing the aquatic toxicity risk.