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Novel Biopesticides Based on Nanoencapsulation of Azadirachtin with Whey Protein to Control Fall Armyworm
Journal of Agricultural and Food Chemistry ( IF 6.1 ) Pub Date : 2022-06-21 , DOI: 10.1021/acs.jafc.2c01558
Michael Bae 1 , Amanda Lewis 2 , Shuhao Liu 1 , Yashwanth Arcot 1 , Yu-Ting Lin 1 , Julio S Bernal 3 , Luis Cisneros-Zevallos 2, 4 , Mustafa Akbulut 1, 5
Affiliation  

Biopesticides have become a global trend in order to minimize the hazards derived from synthetic chemical pesticides and improve the safety, efficacy, and environmental friendliness of agricultural pest management. Herein, we report a novel biopesticide composite encapsulating azadirachtin with the size of 260.9 ± 6.8 nm and its effects on the insect pest Spodoptera frugiperda (fall armyworm). The nanocomposite biopesticide was produced via nano emulsification and freeze-drying process using whey protein isolate as a nanocarrier matrix to encapsulate azadirachtin, a natural insect-killing compound obtained from neem seed. We found that the nanocomposite biopesticide acted quicker and with greater efficacy than bulk azadirachtin treatment with corresponding LC50 values within 11 days of S. frugiperda larvae survival. Through confocal microscopy, we found the enhanced biodistribution of the nanocomposite to all parts of the insect body. Photodegradation assays revealed an enhanced UV stability facilitated by light-scattering stemming from the intrinsic nanostructure and UV scavenging vitamin-E component.

中文翻译:

基于印楝子素与乳清蛋白纳米胶囊的新型生物农药防治秋粘虫

生物农药已成为全球趋势,以尽量减少合成化学农药的危害,提高农业害虫管理的安全性、有效性和环境友好性。在此,我们报告了一种新型生物农药复合物,其包裹印苦楝子素,尺寸为 260.9 ± 6.8 nm,及其对害虫Spodoptera frugiperda(秋粘虫)的影响。纳米复合生物农药是通过纳米乳化和冷冻干燥工艺生产的,使用乳清蛋白分离物作为纳米载体基质包裹印楝素,一种从印楝种子中提取的天然杀虫化合物。我们发现,纳米复合生物农药比使用相应 LC 50的散装印楝素处理更快、更有效。S. frugiperda幼虫存活后 11 天内的值。通过共聚焦显微镜,我们发现纳米复合材料在昆虫身体各个部位的生物分布增强。光降解分析表明,由于内在纳米结构和紫外线清除维生素 E 成分产生的光散射促进了紫外线稳定性的增强。
更新日期:2022-06-21
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