为探讨辣椒品种次生物质与抗侧多食跗线螨Polyphagotarsonemus latus(Banks)的关系,以叶片危害指数为抗性评价指标,利用分光光度法检测了6个辣椒品种在侧多食跗线螨取食前后辣椒碱、多酚和单宁含量的变化。结果显示,在接螨前和接螨后7 d,未在辣椒叶片中检测到辣椒碱;接螨后14 d和21 d,叶片辣椒碱含量上升,但与叶片危害指数之间无显著相关性。接螨前辣椒叶片多酚和单宁含量与接螨后叶片危害指数之间存在显著负相关性,相关系数分别为-0.8410和-0.8714。与接螨前相比,接螨后7 d,抗性品种叶片多酚和单宁含量显著上升,而非抗性品种则显著下降;接螨后14 d和21 d,酚类含量开始下降;接螨后7、14和21 d叶片多酚和单宁含量平均上升率与叶片危害指数之间均存在极显著负相关性,相关系数分别为-0.9826和-0.9133。表明辣椒品种对侧多食跗线螨的抗性表现出组成和诱导抗性2种机制,辣椒品种多酚和单宁含量与抗性大小呈正相关。 In order to explore the relationship between the secondary biomass of pepper varieties and Polyphagotarsonemus latus (Banks), the leaf hazard index was used as the evaluation index of resistance, and six pepper varieties Changes of content of capsaicin, polyphenols and tannin before and after feeding. The results showed that capsaicin was not detected in leaves of pepper before 7 and 6 days after pick-mite, and the content of capsaicin increased on the 14th and 21st day after mites, but no significant correlation was found between the index and the index of leaf damage . There was a significant negative correlation between the content of polyphenols and tannin in leaf and the hazard index of leaves after receiving mite, the correlation coefficients were -0.8410 and -0.8714 respectively. Compared with the preharvest mites, the content of polyphenols and tannin in leaves of resistant varieties increased significantly on the 7th day after mites, but the non-resistant varieties decreased significantly on the 7th day after mites, There were extremely significant negative correlations between the average increase rate of polyphenol and tannin content and leaf damage index at the 7th, 14th and 21st days after picking mites, the correlation coefficients were -0.9826 and -0.9133 respectively. The results showed that there were two mechanisms of resistance and resistance to pepper mite on pest mites. The content of polyphenol and tannin in pepper varieties was positively correlated with the resistance.