Comparison of the trapping efficiencies of lures based on the sex pheromones of two fruit moth species and a ombinationof the sex pheromones of each species

Author of the article:LIU Yu-Feng1** YANG Xiao-Fan1 WANG Chong1 CUI Yan2 LIU Xiao-Xia3MA Chun-Sen4 WEI Guo-Shu*

Author's Workplace：1. College of Plant Protection, Agriculture University of Hebei, Baoding 071001, China; 2. Hebei Plant Protection and Quarantine Station, Shijiazhuang 050011, China; 3. College of Agriculture and Biotechnology,China Agricultural University,Beijing 100193,China.4.Institute of Plant Protection, Chinese Academy of Agricultural Sciences,Beijing 100193, China

Key Words：Grapholita molesta, Carposina sasakii, sex pheromone carrier, combined sex pheromone carriers, trapping efficiency

Abstract：      [Objectives]  To provide a scientific basis for the efficient monitoring and green control of fruit moths in fruit orchards and improve the monitoring and control efficiency of the sex pheromone carriers. [Methods]  The trapping efficiencies of sex pheromone carriers of Grapholita molesta Busck and Carposina sasakii Matsumura were compared to that of a combination of the pheromones of both species in the field. A Y-tube olfactometer was used to compare the preferences of fruit moths for the pheromones of each species and the combined pheromone. [Results]  The individual sex pheromones of G. molesta and C. sasakii and the combination pheromone all effectively trapped G. molesta with catches of 8 238.33, 1 451.67 and 8 321.67 (moth/trap), respectively. The catches of each species’ pheromone and the combination pheromone varied with moth generations; the combined sex pheromone caught more of the first, second and third generations of G. molesta than the G. molesta sex pheromone, but the G. molesta sex pheromone caught more of the overwintering and fourth generation than the combined sex pheromone. C. sasakii sex pheromone caught the fewest G. molesta. G. molesta sex pheromone and the combined sex pheromone were used to monitor five population peaks of G. molesta. Dates of the peak periods were basically the same, but peak day catches with the combined sex pheromone were higher than those achieved with G. molesta sex pheromone. The C. sasakii sex pheromone was used to monitor three peak periods in each of which the peak days catches were lower than those achieved with the other two pheromone treatments. (2) C. sasakii sex pheromone and the combined sex pheromone could both capture C. sasakii with respective total catches of 4.00 and 2.33 (moth/trap), but the G. molesta sex pheromone was not effective at capturing C. sasakii. (3) Both G. molesta and C. sasakii sex pheromone, and the combined sex pheromone, attracted G. molesta in the Y-tube olfactometer test. The respective preferences of G. molesta for the above three treatments were 50.67%, 8.67% and 53.33%. [Conclusion]  A combination of G. molesta and C. sasaki sex pheromone achieved a higher catch rate of G. molesta, but a lower catch rate of C. sasakii compared to the individual sex pheromones of each species, however, there was no significant difference between these three treatments. None of the treatments changed the population dynamics of G. molesta and C. sasakii. Therefore, a combination of the sex pheromones of G. molesta and C. sasaki should be used to monitor and control G. molesta and C. sasakii in peach orchard.