Fabrication and Evaluation of Indoxacarb Nano‐Formulation Based on Corn Starch Esters with Systemic Translocation

• Published in: Starch - Stärke Vol. 74; no. 7-8
• Main Authors: Huang, Yanmin, Chen, Yong, Xiong, Qipeng, Hu, Yanhong, Li, Xiangying, Gan, Chunfang, Zhang, Yuanfei, Cui, Jianguo
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 01.07.2022
• Subjects: Contact angle; Controlled release; Corn; Emulsification; Esters; Fabrication; Fatty acids; indoxacarb; Lethality; nano‐formulations; Pesticides; Starch; Starch ester nanoformulations; Sustained release; systemic translocation; Toxicity; Toxicity testing; Translocation; Transmission electron microscopy
• ISSN: 0038-9056; 1521-379X
• DOI: 10.1002/star.202200056

In this study, through high‐speed emulsification and ultrasonic dispersion technology, indoxacarb‐fatty acid starch ester nano‐formulations (IN‐SE) are prepared using fatty acid corn starch esters as a matrix to encapsulate nonsystemic pesticide indoxacarb (IN). The structure and morphology of the nano‐formulations are characterized by IR, UV, particle size, transmission electron microscopy, and leaf contact angle. The nano‐formulation's sustained release, antiphotolysis capabilities, and systemic translocation are further investigated, and the results show that IN‐SE formulations have better release‐controlled and UV‐shielding capabilities. At the same time, the IN‐SE nano‐formulation is endowed with systemic translocation in plants due to the mediating of starch ester. Finally, using Spodoptera litura as the test target, the toxicity and insecticidal duration of the nano‐formulation are evaluated in greenhouse. The results showed that after 7 days of application, the lethality rate of IN‐SE to S. litura is 9.2% higher than that of ordinary suspension concentrate (IN‐SC). This work develops a new method for preparation of an eco‐friendly indoxacarb‐fatty acid starch ester nano‐formulation, which has better release‐controlled, UV‐shielding capabilities, systemic translocation in plants, insecticidal duration, and is easy to industrialize.