菜粉蝶产卵行为及其影响的生物因素

Oviposition Behavior of Cabbage Butterfly Pieris rapae and its Affecting Biological Factors

对菜粉蝶Pierisrapae的产卵行为观察表明，它先用前足跗节感受植物叶片表面的特征，再用腹端检测适宜产卵的部位，最后才产卵。菜粉蝶对寄主（甘蓝）与非寄主（番茄、烟草）植物的选择和利用，差异极显著；菜粉蝶在甘蓝叶片背面所产的卵量显著多于叶正面；甘蓝附近种植番茄或烟草作为伴生植物，对菜粉蝶在甘蓝上产卵有一定的影响，但差异不显著；甘蓝上有同种卵，对菜粉蝶继续产卵有一定的影响，但差异也不显著。

After the female cabbage butterfly alights on a plant, its oviposition behavior is determinated firstly by sensoring the features of leave surface on its fore tarsi. Then the contact by abdomen-tip of the females may play a role in deciding the appropriate parts for oviposition. The butterfIies lay eggs singly on their host plant leaves and distribute more on leaf back than in leaf front. Despite of contacting occassionally with tomato or tobacco, they never lay eggs on them. Cabbages intercropped with tomato or tobacco may reduce the butterflies to lay egg on them, and the conspecific eggs on cabbage may also affect egg-laying,but both are not statistically significant.