斑点灯(SLF),白鲸(半翅目:Fulgoridae),是一种通才的韧皮部喂食器,可以产生大量的蜜露,这反过来又覆盖了林下。这些昆虫形成覆盖一些树木树干的大型聚集体,而附近的类似树木神秘地似乎没有吸引力。我们通过从野外收集蜜露并在两种选择的嗅觉仪中测试其对SLF的吸引力,研究了SLF蜜露中的挥发物是否对特定物种具有吸引力。我们发现成年雄性SLF排泄的蜜露对雄性SLF有显著的吸引力,但不是女性SLF。尽管成年雌性SLF排泄的蜜露并没有明显吸引雄性或雌性SLF,在嗅觉计中,两性对雌性蜜露的反应均表现出积极的吸引力趋势。对蜜露的顶空挥发物进行了分析,并鉴定了许多化学信息素。其中五个,2-庚酮,2-辛酮,2-壬酮,乙酸苄酯,和1-壬醇,在两次选择行为测定中对空白对照进行了测试。乙酸苄酯和2-辛酮对两性都有吸引力,而2-庚酮只对男性有吸引力,只有女性才有2-nonanone。剩下的化合物,1-壬醇,被排斥的雌性,但不是男性。尽管据报道,蜜露是某些天敌的开罗酮来源,这可能是在飞虱的蜜露挥发物中发现的针对特定昆虫的特定性别引诱剂的第一份报告。
The spotted lanternfly (SLF), Lycorma delicatula (Hemiptera: Fulgoridae), is a generalist phloem feeder that produces copious amounts of
honeydew, which in turn coats the understory. These insects form large aggregations covering the trunks of some trees, while similar trees nearby mysteriously seem unattractive. We investigated whether volatiles from SLF
honeydew are attractive to conspecifics by collecting
honeydew from the field and testing it for SLF attraction in a two-choice olfactometer. We found that honeydew excreted by adult male SLF was significantly attractive to male SLF, but not female SLF. Although the
honeydew excreted by adult female SLF did not significantly attract male or female SLF, both sexes showed a positive trend towards attraction in response to female
honeydew in the olfactometer. Analysis of the headspace volatiles of honeydew was conducted, and numerous semiochemicals were identified. Five of which, 2-heptanone, 2-octanone, 2-nonanone, benzyl acetate, and 1-nonanol, were tested in two-choice behavioral assays against a blank control. Benzyl acetate and 2-octanone were attractive to both sexes, whereas 2-heptanone was only attractive to males, and 2-nonanone only to females. The remaining compound, 1-nonanol, repelled females, but not males. Although honeydew has been reported as a source of kairomones for some natural enemies, this may be the first report of sex-specific attractants for conspecific insects found in the
honeydew volatiles of a planthopper.