The field bioassay of three control methods(trunk injection,foliar spraying and fog spraying) were applied to control Acantholyda posticalis at different scenic spots in Louguantai Forest Park,Shaanxi Province.
以危害油松的阿扁叶蜂为试验对象,研究了树干注药防治、叶面喷雾防治及烟雾防治等施药技术对楼观台国家森林公园不同景区、不同立地条件油松松阿扁叶蜂幼虫防治效果。
The paper introduces the planning principle of the base, the standards and determination of damp-proof and flood control system as well as the calculation of the design level and embankment top elevatio.
该文介绍该基地的规划原则、防潮防洪体系的标准和确定以及设计水位和堤顶高程的计算。
