Synergism experiments showed that the synergistic ratio of DEF and PBO to fenitrothion in R strain were 1.3X and 34.8X, respectively.

• 活体增效作用研究表明，脱叶磷（DEF）和氧化胡椒基丁醚（PBO）对抗性种群可分别增效1.；3和34