我国东部季风区迁飞小地老虎的虫源追溯研究

小地老虎是重要的迁飞性农业害虫。2003-2016年，我们在山东省长岛县北隍城乡采用雷达观测和灯诱监测发现：自4月初至10月底，小地老虎在我国东北农业区和其他农业区之间进行着有规律迁飞。同时，东北、华北、华东、华中地区诱虫灯下的“同期突增”蛾峰进一步表明小地老虎在我国东部季风区不同农业区之间进行着迁移，但不同农业区间的虫源关系与虫源性质尚不明确。本项目拟应用前期发展的稳定同位素和植物DNA条形码技术对小地老虎在我国东部季风区的虫源转移进行追溯，根据成虫高峰期小地老虎的稳定同位素特征和花粉携带特点研究东部季风区不同区域小地老虎虫源关系和虫源性质，探索其在东部季风区的灾变机制。小地老虎在我国东部季风区虫源关系及虫源性质的明确，对于小地老虎的预测预报、异地治理具有重要意义。

The black cutworm, is a serious migratory insect pest. Our previous studies using radar monitoring and searchlight trapping on a small island in the center of the Bohai Strait during 2003-2016 indicated that A. ipsilon undertakes regular migration between the Northeast agricultural region and other agricultural regions every year from early April till end of October. The simultaneous sudden increase of A. ipsilon moths in North, East, Northeast, and Central China provide further evidences for their migration in the different agricultural regions of the Eastern monsoon region. However, it’s still unknown what pattern of seasonal migration this specie exhibits over the Eastern monsoon region. The natal origin of A. ipsilon adults in the Eastern monsoon region will be studied using the natural abundance of stable isotopes in A. ipsilon wing membranes and pollens adhered on A. ipsilon moths. Further the population relations, population characteristics and outbreak mechanism of migration A. ipsilon in Eastern monsoon region will be analyzed on the basis of the stable isotope characteristics and the pollen carrier characteristics. Our work will provide effective information for the forecast and management of A. ipsilon.