莲草直胸跳甲对多种植物取食及产卵研究

Feeding and oviposition of Agasicles hygrophilain different plants under the condition of outdoor and non-selective

[目的]为减少经济损失,全面生物防治喜旱莲子草。[方法]本文在室外非选择条件下研究了莲草直胸跳甲对12种植物的取食和产卵行为。[结果]非选择条件下,莲草直胸跳甲在靶标植物喜旱莲子草上取食和产卵最多;其次,非靶标植物取食量为莲子草>甜菜>莙荙。除了以上植物,莲草直胸跳甲成虫还会取食极少量黄瓜、苋菜和豇豆。莲草直胸跳甲在非靶标植物莲子草上产卵最多,其次是甜菜,在莙荙、豇豆上无产卵现象,而在其他植物上产卵较少,差异显著(P<0.05)。[结论]综合分析认为:莲草直胸跳甲是安全的,这为大面积生物防治喜旱莲子草提供了理论依据。

[Objective]To reduce the economic losses and effectively control A. philoxeroides comprehensively. [Methods]This paper studied the feeding and oviposition behavior of A. hygrophila to 12 plant species in outdoor under the condition of non-selective, [Recults]The results showed that the area of the feeding and the numbers of eggs on the target plant A. philoxeroides were the most. Moreover, the area of the feeding to non-target plants followed the order of Alternanthera sessilis 〉 Beta vulgaris 〉 Beta vulgaris subsp. Cicla. In addition, Agasicles hygrophila could slightly feeding on Cucumis sativus, Amaranthus mangostanus and Vigna unguiculata. The number of eggs on A. sessills was the most in non-target plants, and the second plant was Beta vulgaris. However, there were no spawning phenomenon on Beta vulgaris subsp. Cicla and Vigna unguiculata. There were no significant difference among other plants. [Conclusion]The results showed that Agasicles hygrophila was safe for the ecological environment, and provided a theoretical basis for biological control Alternanthera philoxeroides in large area.