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2012年49 No.4
Analysis of Prunus armeniaca volatiles and the electroantennogramresponses induced by them in Lcolytus rugulosus
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Key Words： Prunus armeniaca，Lcolytus rugulosus，electroantennogram，dynamic headspace analysis
Abstract：In recent years，Lcolytus rugulosus Ratzeburg has seriously affected local apricot crops in the Xinjiang area．
Behavioral tests revealed that L． rugulosus is strongly attracted to its host tree Prunus armeniaca． The volatiles emitted
from different parts of host trees were collected in the field by headspace sampling in situ and analyzed in a
Thermodesorption Cold Trap ( TCT) － GC － MS． Two major classes of compounds，aliphatics［mainly green-leaf volatiles
(GLVs)］ and aldehydes，were found in the host tree species investigated． However，differences could be found with
respect to a few components of the blend． Relative response values to different compounds were measured relative to
counter-2 hexenoic-1-aldehyde as a standard． Electroantennograms from the antennae of L． rugulosus were recorded in
response to 10 kinds of compounds selected from the volatiles in the headspace of apricot trees and other sources． The
strongest response was to the aldehydes heptanal，2-ethyl-butana and nonanal． Some EAG amplitudes were also observed
to green leaf alcohols，but only small EAG amplitudes were observed to α-pinene．