Laboratoire de Recherches en Productions végétales, Institut National de la Recherche Agronomique, B. P. 1232, 97185, Pointe-à-Pitre Cedex, France (F. W. I.).
J Chem Ecol. 1994 Sep;20(9):2213-27. doi: 10.1007/BF02033198.
We investigated the exocrine secretions from the five nymphal instars in the southern green stink bug,Nezara viridula, by analyzing separately the contents of the three dorsal abdominal reservoirs. All DAGs 1 produced a mixture of five alkanes with 12, 13, 14, 15, and 16 carbons. No differences were found between DAGs 2 and DAGs 3, for the five instars: the glands of first instars produce the same alkanes as DAGs 1,n-tridecane, traces of (E)-2-decenal, and a specific compound: (E)-4-oxo-2-decenal. In the other instars (second to fifth), (E)-4-oxo-2-decenal is absent from the secretion but another compound is present: (E)-4-oxo-2-hexenal. The kinetics of production of the different compounds were studied, the maximum amounts produced occurring 36 hr after hatching. The biological function of (E)-4-oxo-2-decenal was investigated. Using olfactometry, we showed that this compound acts as an attractant and an arrestant on second instars, at physiological doses. Moreover, this semiochemical was shown to be repellent to the fire-antSolenopsis geminata, a potential predator ofN. viridula and we established the dose-response curve for the repellent activity.
我们通过分别分析三个背腹部储液囊中的内容物，研究了南方绿椿象（Nezara viridula）五个若虫龄期的外分泌产物。所有 DAG1 都产生了 12、13、14、15 和 16 个碳原子的五种烷烃混合物。在五个龄期之间，DAG2 和 DAG3 之间没有差异：第一龄期的腺体产生与 DAG1 相同的烷烃，正十三烷、痕量（E）-2-癸烯醛和一种特定化合物：（E）-4-氧代-2-癸烯醛。在其他龄期（第二至第五龄期），分泌物中没有（E）-4-氧代-2-癸烯醛，但存在另一种化合物：（E）-4-氧代-2-己烯醛。我们研究了不同化合物的产生动力学，孵化后 36 小时产生的最大量。研究了（E）-4-氧代-2-癸烯醛的生物学功能。使用嗅觉计，我们表明，这种化合物在生理剂量下对第二龄期的若虫具有引诱和阻止作用。此外，这种半化学物质对红火蚁（Solenopsis geminata）具有驱避作用，红火蚁是南方绿椿象的潜在捕食者，我们建立了驱避活性的剂量反应曲线。
