Abstract:

Persimmon bark borer, Euzophera batangensis, is a principal insect pest in jujube orchards. It may cause severe damage in jujube orchards and can also attack many other plants, such as loquat (Eriobotrya japonica), Horsetail Tree (Casuarina equisetifolia) etc. The sex bionomic characteristics of the moth were observed and investigated in lab and in field. The emergence of the moth in evening (17：00-20：00) accounted for 45.71% of the total. The mating time mainly occurred from late night to early morning. Gas chromatography with electroantennographic detection (GC-EAD) detected responses of the male to different components in the female sex pheromone gland extract, and two-dimensional (GC×GC) gas chromatography with a time-of-flight mass spectrometric detector (TOFMS) tentatively determined the pheromone substances were (Z9,E12)-tetradeca-9,12-dien-1-ol (Z,E)-9,12-14∶OH) and (Z9)-tetradec-9-en-1-ol (9Z-14∶OH), and they were closely related to that from other Euzophera species. Spectral characteristics, retention behavior and the ability to elicit GC-EAD responses suggested that both the identified unsaturated alcohols were candidates of sex pheromone components for E. batangensis. Subsequently a field trapping test with other isomeric compounds of the (Z,E)-9,12-14：OH and 9Z-14：OH in jujube orchards showed that (Z,E)-9,12-14：OH attracted significantly more male moth of the borer in comparison to control and others chemicals. For the different dosage (5,50,500,1 000　μg) response, field tests showed the dose of 500 μg (Z,E)-9,12-14：OH trapped the moth of the borer most.

Key words: Euzophera batangensis, sex pheromone, bionomics, jujube