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Key factors influencing chlamydospore germination of rice kernel smut Biological characteristics and habitat requirements of Parnassius imperator (Lepidoptera: Parnassidae) THE USE OF GREY SEQUENCE FOR THE IDENTIFICATION OF KEY FACTORS FROM LIFE TABLE DATA OF INSECTS Age Specific Life Table of Chinese White Wax Scale (Ericerus pela)Natural Population and Analysis of Death key Factors Principal Component Analysis on the Key Metabolism Factors for Bloom of Phyllostachys heteroclada and Neosinocalamus affinis