Reyhane Sattari Nasab, Mahdi Ziaaddini, Astrid T Groot
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引用次数: 0
Abstract
Egg parasitoids have evolved various strategies to overcome the reliability-detectability problem and efficiently parasitize host eggs. Identifying what cues egg parasitoids use is important to increase their efficiency as biocontrol agents. In this study, we investigated the role of chemical cues from eggs and defensive compounds of the pistachio green stink bug (PGSB), Acrosternum arabicum (Hemiptera: Pentatomidae), on the foraging behavior and adult sex discrimination by the egg parasitoid Psix saccharicola (Hymenoptera: Scelionidae). Parasitoid responses to volatiles from PGSB egg masses and sex-specific metathoracic gland (MTG) extracts were evaluated using a Y-tube olfactometer. We found that P. saccharicola was significantly attracted to volatiles emitted by egg masses and to MTG extracts from both sexes. However, parasitoids did discriminate between males and females by displaying longer residence times in the arm containing the female MTG extract. Gas chromatography analysis showed that MTG and egg masses extracts contained largely similar chemical profiles, consisting of various alkanes, aldehydes and esters, with the major compounds being tridecane, (E)-2-decenal, and (E)-2-decenyl acetate. Our SEM analysis suggest that MTG secretions are passively deposited onto the eggs. Together, our findings suggest that PGSB volatile compounds from the MTG attract the egg parasitoid, which may be useful in developing semiochemical-based biological control strategies against PGSB.
期刊介绍：
Journal of Chemical Ecology is devoted to promoting an ecological understanding of the origin, function, and significance of natural chemicals that mediate interactions within and between organisms. Such relationships, often adaptively important, comprise the oldest of communication systems in terrestrial and aquatic environments. With recent advances in methodology for elucidating structures of the chemical compounds involved, a strong interdisciplinary association has developed between chemists and biologists which should accelerate understanding of these interactions in nature.
Scientific contributions, including review articles, are welcome from either members or nonmembers of the International Society of Chemical Ecology. Manuscripts must be in English and may include original research in biological and/or chemical aspects of chemical ecology. They may include substantive observations of interactions in nature, the elucidation of the chemical compounds involved, the mechanisms of their production and reception, and the translation of such basic information into survey and control protocols. Sufficient biological and chemical detail should be given to substantiate conclusions and to permit results to be evaluated and reproduced.
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