Trapping efficacy and influencing factors of sex attractants on the trapping of Spodoptera frugiperda in fresh corn field.
To optimize the sex pheromone trap technology for Spodoptera frugiperda, the trapping efficacy of different lures and trap types, hanging height and distance were studied. The results would provide technical support to the population monitoring and control of S. frugiperda. Nine different combinations of 3 lures and 3 traps were used to compare the trapping efficacy in the field. The combination of lures from Bioglobal and special trap were used to compare the trapping efficacy of different hanging height and interval. In addition, this combination was used to monitor the local annual occurrence of S. frugiperda adult population. The results showed that the trapping efficacy using combination of lures from Bioglobal and special trap was the best. However, there were no significant difference among the 3 different lures. The trapping efficacy of the special trap was the best, while the universal moth trap was worse. At the jointing stage of corn, there was no significant difference in the attracted moth number among the four hanging heights, and the attracted moth number at the height of 2.2 m was significantly higher than that of other treatments after tasseling stage. The number of moths attracted by the traps at 30 m interval was significantly higher than that at 20 m and 25 m interval. There was no significant difference in the plant damage rate among three treatments. In 2020, five adult peaks were observed in mid-May, late June, late July, early September and mid-October. The special trap combined with the lures from Bioglobal had the best trap effect. And the optimal hanging height in the field should be higher than that of the corn plant. The distance between the trap in the field should be 30 m. Sex pheromone trap technology can be used in the population monitoring of S. frugiperda and as an auxiliary means of pest control.