延安市苹果园病虫害发生规律和范围调查研究

Report on Scope and Regularity of Apple Orchards of Diseases and Pests

记录延安市一年生长季节中苹果园发生病虫害种类和范围,分析了解不同种类病虫害的发生规律,为建立科学的病虫害防治体系提供依据。

This paper recorded the scope and regularity of apple orchards of diseases and pests, analyzed the regularity of different species, provide the basis for establishing scientific system of prevention and control of plant diseases and insect pests.