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首页> 外文期刊>Anthropod-plant interactions >Electrophysiological and behavioral response of the oriental fruit moth Grapholita molesta (Busck, 1916) (Lepidoptera: Tortricidae) to the volatiles of apple fruits at different stages of development
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Electrophysiological and behavioral response of the oriental fruit moth Grapholita molesta (Busck, 1916) (Lepidoptera: Tortricidae) to the volatiles of apple fruits at different stages of development

机译：东方果蛾Grapholita molesta（Busck，1916）（鳞翅目：Tortricidae）对苹果果实不同发育阶段的挥发物的电生理和行为响应

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摘要

The oriental fruit moth, Grapholita molesta, occurs in Southern Brazil throughout the year, and migrates from peach to apple orchards. Because moths rely on volatile organic compounds (VOCs) during the host-location process, variations in the emission of these compounds during fruit maturation can influence the time of infestation and preference of the moths for a particular genotype. The aim of this work was to identify VOCs emitted by the apples "Eva" and "Gala" at different stages of development and to determine the behavioral and electrophysiological responses of G. molesta to these compounds. For this purpose, VOCs from immature, maturing, and mature fruits of both cultivars were collected and analyzed by gas chromatography and gas chromatography-mass spectroscopy. The response of the antennae of virgin males and females and mated females to volatiles released by the three fruit stages was registered by gas chromatography coupled to an electroantennography. A dual-choice behavioral test for the different combinations of insect groups and fruit stage was also performed. Amongst the volatiles released by mature fruits, twelve compounds elicited a response. The antennae of the oriental fruit moth did respond to isoamyl hexanoate and alpha-farnesene emitted by "Eva" maturing fruits. In general, virgin females did not respond to volatiles in olfactometer bioassays and mated females were attracted to volatiles released by mature fruits. Our results show that the variation in the emission during the maturation of fruits can influence the orientation of G. molesta.
机译：东方果蛾Grapholita molesta一年四季都分布在巴西南部，从桃子迁移到苹果园。由于蛾在寄主定位过程中依赖挥发性有机化合物（VOC），因此在水果成熟过程中这些化合物的排放变化会影响蛾的侵袭时间和对特定基因型的偏好。这项工作的目的是确定苹果“ Eva”和“ Gala”在发育的不同阶段释放的VOC，并确定G. molesta对这些化合物的行为和电生理响应。为此，收集了两个品种的未成熟，成熟和成熟果实的VOC，并通过气相色谱和气相色谱-质谱法进行了分析。气相色谱法和电性血管造影技术记录了初生雄性和雌性以及交配雌性的触角对三个果实阶段释放的挥发物的反应。还对昆虫组和果实期的不同组合进行了双重选择行为测试。在成熟果实释放的挥发物中，有十二种化合物引起了反应。东方果蛾的触角确实对“ Eva”成熟果实发出的异戊酸异戊酯和α-法呢烯作出反应。通常，在嗅觉仪生物测定中，未婚女性对挥发性物质没有反应，交配的女性被成熟果实释放的挥发性物质吸引。我们的结果表明，果实成熟过程中排放的变化会影响G. molesta的方向。

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