›› 2010, Vol. 53 ›› Issue (12): 1390-1403.
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LU Peng-Fei, HUANG Ling-Qiao, WANG Chen-Zhu
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Abstract: The oriental fruit moth (OFM), Grapholitha molesta Busck, is an important pest of stone fruits in North China. Semiochemicals play a crucial role in hostplant selection and mate location of this pest, and thus manipulating insect behaviour through the application of semiochemicals in the environment has become a practical method in OFM management. This article reviews the research progress on OFM attractants, including female and male sex pheromones, pheromone-based mating disruption techniques, and host plant volatiles and their use in pest attraction. The sex pheromone components included (Z)-8-dodecenyl acetate, (E)-8-dodecenyl acetate, (Z)-8-dodecenol and dodecanol. The geographic variation was found in ratio of components. In the laboratory bioassay, the two acetate esters were essential to attractiveness, and (Z)-8-dodecenol had synergistic effects. In the field tests, the three-component blend was also attractive. Mating disruption of G. molesta was successfully carried out by using hand-applied pheromone dispensers, wax drops and sprayable microencapsulated pheromone. Twenty-two compounds were identified in peach shoots. Green leaf volatiles accounted for more than 50% of the total emitted volatiles. A bioassay indicated the compounds with a chain length of 6-8 carbon atoms were bio-active. The 5-compound mixture, (E)-2-hexenal, (Z)-3-hexen-1-ol, (Z)-3-hexen-1-yl acetate, benzaldehyde and benzonitrile, was as attractive as natural peach shoots volatiles. Benzylnitrile accounted for 0.14% of the total emitted volatiles of peach shoots, but it played a key role in successful recognition and behavioral discrimination of suitable host plants. Further investigations on semiochemicals in G. molesta are discussed.
The oriental fruit moth (OFM), Grapholitha molesta Busck, is an important pest of stone fruits in North China. Semiochemicals play a crucial role in hostplant selection and mate location of this pest, and thus manipulating insect behaviour through the application of semiochemicals in the environment has become a practical method in OFM management. This article reviews the research progress on OFM attractants, including female and male sex pheromones, pheromone-based mating disruption techniques, and host plant volatiles and their use in pest attraction. The sex pheromone components included (Z)-8-dodecenyl acetate, (E)-8-dodecenyl acetate, (Z)-8-dodecenol and dodecanol. The geographic variation was found in ratio of components. In the laboratory bioassay, the two acetate esters were essential to attractiveness, and (Z)-8-dodecenol had synergistic effects. In the field tests, the three-component blend was also attractive. Mating disruption of G. molesta was successfully carried out by using hand-applied pheromone dispensers, wax drops and sprayable microencapsulated pheromone. Twenty-two compounds were identified in peach shoots. Green leaf volatiles accounted for more than 50% of the total emitted volatiles. A bioassay indicated the compounds with a chain length of 6-8 carbon atoms were bio-active. The 5-compound mixture, (E)-2-hexenal, (Z)-3-hexen-1-ol, (Z)-3-hexen-1-yl acetate, benzaldehyde and benzonitrile, was as attractive as natural peach shoots volatiles. Benzylnitrile accounted for 0.14% of the total emitted volatiles of peach shoots, but it played a key role in successful recognition and behavioral discrimination of suitable host plants. Further investigations on semiochemicals in G. molesta are discussed.
Key words: Oriental fruit moth, semiochemical, sex pheromone, host plant volatiles, mating disruption, pest control
LU Peng-Fei, HUANG Ling-Qiao, WANG Chen-Zhu. Semiochemicals used in chemical communication in the oriental fruit moth, Grapholitha molesta Busck (Lepidoptera: Tortricidae)[J]., 2010, 53(12): 1390-1403.
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http://www.insect.org.cn/EN/Y2010/V53/I12/1390
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