Specific Foraging Kairomones Used by a Generalist Parasitoid
Specific Foraging Kairomones Used by a Generalist Parasitoid
复制标题
多面寄生蜂使用的特定觅食利它素
DOI：
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发表时间：
2004
影响因子：
2.3
通讯作者：
J. Ruther
中科院分区：
文献类型：
--
作者：
J. Steidle;A. Steppuhn;J. Ruther
一般来说，一般认为通才型的天敌并不天生就使用特定的线索来确定其寄主或猎物的位置。使用多面手寄生虫Lariophagus distinguendus Förster的幼稚雌性及其两种宿主（小谷蠹Rhyzopertha dominica（F.）的幼虫）来测试这一假设。和谷物象鼻虫Sitophilus granarius L.，以小麦为食在一个四室嗅觉仪中，雌拟寄生蜂被两种寄主粪便中散发的挥发物所吸引。本文报道了红腹锦鸡儿粪便中挥发性物质的化学分析。dominicalure 1和dominicalure 2是谷蠹的种特异性聚集信息素。多米尼克.结果表明，该虫粪便挥发物中的主要成分为：granarius是与L.你好因为这些螨不是S.此外，由于麦谷盗也与其他寄主共现，因此必须将螨类化学物质视为一般线索。在生物测定中，合成的dominicalure对幼稚L. Escherichia coli的粪便挥发物的吸引力。多米尼克.人工合成螨类化学物质和嗜食螨素是该螨的聚集信息素。granarius，对拟寄生蜂无明显影响。目前尚不清楚是哪些先天化学线索从粪便中的S。granarius为L.你好与我们最初的假设相反，通才L。龙蜥天生就利用特定的线索来觅食。两个想法来解释这一结果。
In general, it is assumed that generalist natural enemies do not innately use specific cues for the location of their host or prey species. This hypothesis was tested using naïve females of the generalist parasitoid Lariophagus distinguendus Förster and two of its hosts, larvae of the lesser grain borer Rhyzopertha dominica (F.) and of the granary weevil Sitophilus granarius L., feeding in wheat grains. In a four-chamber olfactometer, female parasitoids were attracted to volatiles emanating from the feces of both host species. Chemical analysis of the volatiles from the feces of R. dominica revealed the presence of dominicalure 1 and 2, the species specific aggregation pheromones of R. dominica. The main compounds in the volatiles from feces of S. granarius were identified as chemicals related to mites that are associated with hosts of L. distinguendus. Because these mites are not specific for S. granarius but also co-occur with other hosts, the mite chemicals have to be considered as general cues. In bioassays, synthetic dominicalure was attractive to naïve L. distinguendus, explaining the attraction of feces volatiles from R. dominica. Synthetic mite chemicals and sitophilate, the aggregation pheromone of S. granarius, had no effect on naïve parasitoids. It remains to be determined which innate chemical cues from feces of S. granarius are used by L. distinguendus. In contrast to our initial hypothesis, the generalist L. distinguendus is innately using specific cues for foraging. Two ideas are provided to explain this result.