Archive | 2021
Selective Influence of Cyflumetofen in Degradation and Ecological Risk Assessment
Abstract
Pesticide pollution has gradually caused land degradation. In order to\navoid this problem, it is recommended to use enantiomeric pesticides\nthat have less impact on the soil. The degradation of CYF enantiomers\nand the effect on soil functions are closely related to microorganisms.\n(+)-CYF enantiomer is degradable preferred and further discovered that\nrelated microorganism that degrades enantiomers. CYF enantiomers alter\nthe bacteria structure and decreased the bacteria abundance. The\ncombination of high-throughput and quantitative PCR results showed that\nthe diversity of the (+)-CYF treatment was significantly lower than that\nof the (-)-CYF (-30.41 to 44.60) treatment and the (+)-CYF treatment\n(-27.80 to 56.70%) was more capable of causing the decrease in the\nnumber of soil microorganisms. In addition, (+)-CYF severely interferes\nwith nitrogen cycling-related functions. Furthermore, the soil microbial\nstructure was changed to its original level by enantiomers posed. In the\nstudy of nitrogen cycle function, we found that both enantiomers can\nrestrain the abundance of nitrogen cycle-related genes, especially the\n(+)-CYF treatment decreased more. CCA showed that g-Massilia and\ng-Arthrobacter are closely related to nitrogen fixation genes and\nnitrification genes and degradation of the two enantiomers of CYF by\ng-Arthrobacter is closely related. The biological effects of\ncyflumetofen enantiomers remain unclear. Bioassay results show that\nenantiomers have similar virulence to Tetranychus cinnabarinus.\nTherefore, while achieving the prevention and control effect, the use of\na single isomer (+)-CYF has a higher potential risk to the soil\necosystem.