Emamectin benzoate nanogel suspension constructed from poly(vinyl alcohol)-valine derivatives and lignosulfonate enhanced insecticidal efficacy

• Published in: Colloids and surfaces, B, Biointerfaces B, Biointerfaces, 2022-01, Vol.209 (Pt 1), p.112166-112166, Article 112166
• Main Authors: Zhang, Da-xia, Wang, Rui, Cao, Haichao, Luo, Jian, Jing, Tong-fang, Li, Bei-xing, Mu, Wei, Liu, Feng, Hou, Youming
• Format: Article
• Language: English
• Subjects: Amino acid; Insecticides; Ivermectin - analogs & derivatives; Laccase; Lignin - analogs & derivatives; Nanogels; Polyethylene Glycols; Polyethyleneimine; Polyvinyl Alcohol; Responsive controlled release; Self-assembly; Stability; Valine
• ISSN: 0927-7765; 1873-4367
• DOI: 10.1016/j.colsurfb.2021.112166

To reduce the negative impact of nanopesticide carriers of on the environment, a greener nanodelivery system is necessary. Nanogels are nontoxic and degradable carriers, however, the potential of nanogels for delivering pesticides has not been proven. In this study, poly(vinyl alcohol)-valine, an ecofriendly polymer, was synthesized and used to fabricate emamectin benzoate nanogel suspension (EB NS). The nanoformulation showed favorable stability at low temperature, high temperature or one year storage, and in water with different hardnesses. The retention of the EB NS solution on leaves was higher than that of an EB emulsifiable concentrate (EC) by approximately 9% at a concentration of 10 mg L−1. The half-life of EB nanogels under Ultra Violet irradiation was prolonged by 3.3-fold. Moreover, the bioactivity of the EB NS against Plutella xylostella was higher than that of the EB EC. These advantages resulted in a relatively long duration of pest control. The response of nanogels to laccase, a digestive enzyme in the digestive tract of lepidopteran pests, enables pesticide release on demand. Nanogels have the advantages of being ecofriendly carriers, exhibiting higher utilization, and prolonged pest control periods, and they have a brilliant future in pesticide delivery. [Display omitted] •The coacervation of polymer controls the formation and delivery of nanogels.•The response of nanocarriers to laccase realized precise pesticide delivery.•The research of formulation promotes the application of nanopesticide.•The grafting of amino acid increases the application of polyvinyl alcohol.