Yang L, Hu X P, van Santen E, Zeng X N
College of Agriculture, South China Agricultural University, China.
Department of Entomology and Plant Pathology, Auburn University.
J Econ Entomol. 2017 Dec 5;110(6):2351-2356. doi: 10.1093/jee/tox214.
The kudzu bug, Megacopta cribraria (Fabricius), is an invasive pest of soybeans, Glycine max (L.) Merr., that has recently been detected in the United States. This study investigated whether there was a differential attraction of adult bugs to soybean growth stages, and whether the attraction was related to soybean constitutive volatiles. Greenhouse choice assays examined the behavioral orientation preference of adult bugs exposed to four growth stages of whole soybean plants: vegetative (V2), flowering (R1), pod (R3), and seed (R5). Results show that significantly more adults landed on plants in the early reproductive stage R1 than in other stages. Laboratory olfactometer assays also demonstrate that significantly more adult bugs were attracted to R1 plants, with females responding more strongly than males. Both greenhouse and olfactometer assays indicate that the differential attraction of adult bugs to soybean growth stages was mediated by plant constitutive volatiles. These results offer an insight into kudzu bug chemical and behavioral ecology and thus are of great significance for optimizing the timing of field scouting and treatment as well as the development of soybean pest management programs.
葛藤蝽（Megacopta cribraria (Fabricius)）是大豆（Glycine max (L.) Merr.）的一种入侵性害虫，最近在美国被发现。本研究调查了成年葛藤蝽对大豆不同生长阶段的吸引力是否存在差异，以及这种吸引力是否与大豆的组成型挥发物有关。温室选择试验研究了成年葛藤蝽暴露于全株大豆四个生长阶段（营养期（V2）、开花期（R1）、结荚期（R3）和种子期（R5））时的行为定向偏好。结果表明，与其他阶段相比，显著更多的成年葛藤蝽落在生殖早期R1阶段的植株上。实验室嗅觉仪试验也表明，显著更多的成年葛藤蝽被R1阶段的植株吸引，其中雌性的反应比雄性更强。温室试验和嗅觉仪试验均表明，成年葛藤蝽对大豆生长阶段的差异吸引力是由植物组成型挥发物介导的。这些结果为葛藤蝽的化学生态学和行为生态学提供了见解，因此对于优化田间巡查和处理的时间以及大豆害虫管理计划的制定具有重要意义。
