Abstract
This research measured the lethal concentrations of dipterex to larval populations of Culex pipiens pallens L. in Zhejiang and determined the esterase activity level in each female population. The LC50 of dipterex for each larval population was 0.35 ppm for Ningbo, 0.46 ppm for Hangzhou, 0.47 ppm for Zhoushan, 0.66 ppm for Wenzhou, 0.71 ppm for Jiaxing, 0.75 ppm for Jinhua, and 1.43 ppm for Taizhou. The average integral value, the index of esterase activity for each female population, was 5,780.7 for Ningbo, 6,425.9 for Hangzhou, 7,045.9 for Zhoushan, 7,259.9 for Jiaxing, 8,283.2 for Jinhua, 9,046.3 for Wenzhou, and 12,907.9 for Taizhou, which were higher than those in the early 1990s. The index of esterase activity provided the following levels of resistance: Ningbo was classified as a region of low OP resistance; Hangzhou, Zhoushan, and Jiaxing were regions of middle OP resistance; Jinhua and Wenzhou were regions of middle to high resistance; and Taizhou as a region of high resistance.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.