摘要
[ Objective ] The paper was to study the most suitable density of chemical pheromone to control Spodoptera litura in tobacco fields. [ Method ] Sixteen traps （ 4 lines x 4 rows） were placed according to the specifications of 25. 8 m ×25.8 m （ 15. 0 trap/hm2 ）, 31. 6 m× 31.6 m （ 10.0 trap/hm2 ） and 36.5 m × 36.5m （ 7.5 trap/hm2 ）. Meanwhile, a control area larger than 2 hm2 was set up with three repetitions. [ Result] Without consideration of impact of wind direc- tion, the amount of trapping moth increased with the increasing controlled area of single trap, but difference of trapping amount of moth was not significant under three different density treatments. Three placement densities could effectively control S. liture in tobacco fields, thereby reduce the use of pesticides and protect the natural enemies and reduce the control cost. [Conclusion] The suitable density of chemical pheromone traps to control S. litura was 31. 6 m x31. 6 m （10.0 trap/hm2 ）.
[ Objective ] The paper was to study the most suitable density of chemical pheromone to control Spodoptera litura in tobacco fields. [ Method ] Sixteen traps （ 4 lines x 4 rows） were placed according to the specifications of 25. 8 m ×25.8 m （ 15. 0 trap/hm2 ）, 31. 6 m× 31.6 m （ 10.0 trap/hm2 ） and 36.5 m × 36.5m （ 7.5 trap/hm2 ）. Meanwhile, a control area larger than 2 hm2 was set up with three repetitions. [ Result] Without consideration of impact of wind direc- tion, the amount of trapping moth increased with the increasing controlled area of single trap, but difference of trapping amount of moth was not significant under three different density treatments. Three placement densities could effectively control S. liture in tobacco fields, thereby reduce the use of pesticides and protect the natural enemies and reduce the control cost. [Conclusion] The suitable density of chemical pheromone traps to control S. litura was 31. 6 m x31. 6 m （10.0 trap/hm2 ）.
基金
Supported by Integration Research and Application of Biological Control Technology against Pests and Diseases in Lincang Ecological Feature Tobacco Growing Areas ( 2011YN79)
