Kidd N A C
Department of Biological Science, Kingston College of Education, Hull.
Oecologia. 1976 Sep;22(3):299-304. doi: 10.1007/BF00344799.
Lime aphids feed on the contents of sieve tubes in the leaf veins. Aphids on the undersides of large leaves tend to select the smallest veins, while those on small leaves tend to select the larger veins. This tendency increases with the size of the aphid. Since only 4% of the total leaf area is covered by the larger veins, crowding is imposed on those aphids feeding from them. In spring, when the leaves are young and small, close spacing of the aphids results due to their tendency to select large veins. In summer, when the leaves are mature and large, wider spacing between aphids occurs due to their tendency to occupy more of the leaf surface.
叶蝉以叶脉筛管中的内含物为食。大叶背面的叶蝉倾向于选择最小的叶脉，而小叶上的叶蝉则倾向于选择较大的叶脉。这种倾向随着叶蝉的体型增大而增强。由于只有4%的总叶面积被较大的叶脉覆盖，从这些叶脉取食的叶蝉会面临拥挤问题。在春季，叶片幼嫩且小，叶蝉因倾向于选择大的叶脉而导致彼此间距很近。在夏季，叶片成熟且大，叶蝉因倾向于占据更多的叶面而彼此间距更宽。
