不同寄主植物对美洲斑潜蝇的适合度及其与叶片结构的关系

应用选择指数法和适合性指数法定量测定了山西省 14种常见寄主植物对美洲斑潜蝇 (Liriomyzasati vaeBlanchard)的适合度。根据其适合度将寄主植物划分为 3个类型 ,即适宜寄主、较适宜寄主和次要寄主。在此基础上 ,进一步研究了不同寄主植物对美洲斑潜蝇的适合度与叶片表面结构和解剖结构的关系。结果表明 :适合度与叶片上表皮毛数、毛长度、上表皮厚度、栅栏组织厚度和叶片厚度之间均无显著相关性 (r r0 0 5)。其结果为美洲斑潜蝇的持续控制奠定了理论基础

The Relationship between the Fitness of Host Plants to Liriomyza sativae and the Structure of Leaf Blades

The fitness of 14 common host plants to the leafminer was quantitatively tested with the selective index and modified fitness index methods in Shanxi Province. According to the fitness index ( FI ),the host plants of Liriomyza sativae were divided into three categories by the hierachical clustering analysis:the most suitable,suitable and secondary. On the basis of those,the relationship of the fitness of host plants to the leafminer with the surface and anatomical structure of leaf blades were further studied in this paper. The results indicated that there were no significant correlated relationship ( r < r 0 05 ) between FI and the epicuticle hair numbers,its hair length,epicuticle thickness,palisade tissue thickness and thickness of leaf blades respectively,whereas there existed significant correlated relationship ( r =0 6236> r 0 05 ) between the mine area of L.sativae on the host plants and the cell width of palisade tissue of leaf blades. These results might provide a theoretical basis for the sustainable control of L.sativae .