摘要
采用室内自由选择法和发育测定法研究莲草直胸跳甲(Agasicles hygrophila)成虫对喜旱莲子草(Alternanthera philoxeroides)叶位的产卵选择性及后代发育与不同叶位叶片的适合度。结果表明:(1)莲草直胸跳甲成虫嗜好在中部叶片的叶背产卵,以在第2对叶上的选择系数最高,选择率为35.18%,与第1对叶上的28.03%差异不显著,但显著高于对其他叶位的选择系数;(2)相对于在叶表进行取食,初孵幼虫显著趋向在叶背,且这样取食的1龄幼虫存活率高、发育历期显著缩短,这与雌虫选择在叶背产卵的习性相符,说明其选择有一定生物学意义,即有利于后代发育;(3)叶龄对莲草直胸跳甲各龄幼虫发育有显著影响,叶位越低,各龄幼虫的发育历期越长,但存活率上以取食第1叶位的为最高。
The oviposition preference of Agasicles hygrophila for leaf position of host plant alligatorweed (Alternanthera philoxeroides) and larval performance on the leaves in terms of duration and survivorship were observed in this experiment. The adult female beetle preferred to oviposit on the undersides of leaves in the middle layers of the leaves of alligatorweed, with the second pair of the leaves having the highest preference index (35.18%) among the leaves. The preference index for the first pair of leaves w...
出处
《热带作物学报》
CSCD
2009年第3期353-356,共4页
Chinese Journal of Tropical Crops
基金
973资助项目(No2009CB119200)
国家科技支撑项目(No2006BAD08A18)资助
关键词
莲草直胸跳甲
叶位
产卵选择
适合度
Agasicles hygrophila
leaf position
oviposition preference
larval performance.
