Fabrication and evaluation of Lambda-Cyhalothrin nanosuspoemulsion with pH- and temperature-responsive based on polyethylene wax as carrier.

Yanmin Huang, Xiangying Li, Dongmei Mo, Haiyan Yuan, Qiang Hu, Yang Jiang, Chunfang Gan, Yong Chen, Weiguo Li, Rui Lu, Jianguo Cui

Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes 2021

filter terms:

Using polyethylene wax (PW) as the coating matrix, the lambda-cyhalothrin-PW nanosuspoemulsion (LC-PW) with a particle size of 80-150nm was prepared through high-speed stirring, hot melt emulsification and ultrasonic dispersion. The formulation and composition of the LC-PW were optimized, the morphology of the LC-PW was analyzed by dynamic light scattering (DLS) and TEM, and the structure of the LC-PW was characterized by UV and IR. The anti-photolysis test showed that LC-PW had a good anti-photolysis performance. Furthermore, LC-PW could sustainably release Lambda-cyhalothrin, which was pH- and temperature dependent. The insecticidal activity analysis in the greenhouse indicated that the toxic strength between LC-PW and LC-SC (lambda-cyhalothrin-suspension concentrate) to Mythimna separata was similar within the same concentration ranges tested, but the insecticidal duration of LC-PW was significantly longer than LC-SC. Thus, the new type of LC-PW with the properties of anti-photolysis and controlled release is suitable for application in the field as a better insecticide.

Citation

Yanmin Huang, Xiangying Li, Dongmei Mo, Haiyan Yuan, Qiang Hu, Yang Jiang, Chunfang Gan, Yong Chen, Weiguo Li, Rui Lu, Jianguo Cui. Fabrication and evaluation of Lambda-Cyhalothrin nanosuspoemulsion with pH- and temperature-responsive based on polyethylene wax as carrier. Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes. 2021;56(8):741-752