梨花迁粉蝶成虫的产卵行为

【背景】梨花迁粉蝶是园林植物伞房决明、黄花决明、铁刀木上的主要害虫。【方法】在福建省三明市明溪县蝴蝶生态园内观察不同时段梨花迁粉蝶成虫的飞行活动与产卵行为。【结果】梨花迁粉蝶成虫的飞行活动与产卵行为密切相关（R=0．9406），飞行与产卵频率都是在上午8：00～11：00较高。梨花迁粉蝶卵多产于第2和第3片复叶，第6片复叶上未发现卵；同时，梨花迁粉蝶卵多产于复叶末端的小叶上，其临近叶片上的卵量逐渐减少；叶片正面和背面的卵量差异不显著；植株新芽、茎秆、花等部位上的产卵量极少；梨花迁粉蝶在盆栽决明和水培决明上的产卵量无显著差异。【结论与意义】梨花迁粉蝶飞行与产卵有特定的规律，这对于其田间调查和防治具有重要意义。

Flight activity and egg-laying behavior in the Catopsilia pyranthe L. (Lepidoptera: Pieridae)

[ Background ] Catopsilia pyranthe L. is one of the major pests of garden plants, cassia （ Cassia corymbosa）, yellow cas sia （Cassia alata L. ）, and chestnut trees （Cassia siamea L. ）. [ Method] The flight and oviposition behavior of C. pyranthe were observed on cassia plants in the butterfly ecology garden of Sanming City, Mingxi County, Fujian Province. [ Result]The flight ac tivity and egglaying behavior of the adult Catopsilia pyraathe was significantly （R = 0.9406 ） correlated. The species was most active in the morning hours （08 ： 00 11 ： 00） and laid most eggs during this period. Most eggs were deposited on the leaves, with no difference between upper and lower leaves. Single eggs were found laid on the bud shoot, stem, flowers of cassia plant. The butter flies laid their eggs mostly on the second and the third compound leaves gradually decreasing on other, and none were found on the sixth compound leaves. The butterfly laid eggs on the leaflets of the end of fronds, and the numbers of eggs near the leaflet were gradually reduced. Equal number of eggs were laid on potted cassia plants and on branches cut off the plant and kept in a hydroponic solution. [Conclusion and significance]The flight activity correlates well with egglaying and is a suitable method to monitor the pest potential under field conditions.