In this paper, the RAPD reaction system in Cycadaceae has been established and applied to discuss the relationships among 21 species.

本研究建立了苏铁科植物RAPD的反应体系，进而用于探讨苏铁科苏铁属21个不同种类的亲缘关系。研究结果表明。

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Checklists of the known diseases and insect pests were provided, and the identification keys were prepared separately for the known diseases and insect pests of Cycadaceae in China.

简述了苏铁病虫害研究概况、主要病虫害发生规律和防治措施，提供了中国已知苏铁病虫害名录并编制出检索表。

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The known diseases and insect pests of Cycadaceae in China and their control were summarized, and 4 species of disease and 45 species of insect pest damaging Cycadaceae plants in China were recorded.

对中国苏铁科植物已知病虫害及其防治研究进行综述，整理出已知病害4种，虫害45种。

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