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

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 .