烟粉虱天敌沙巴拟刀角瓢虫与越南斧瓢虫的捕食行为比较

在实验室条件下研究了沙巴拟刀角瓢虫Serangiella sababensis Sasaji与越南斧瓢虫Axinoscymnus apioides Kuzne tsov and Ren对烟粉虱Bemisia tabaci(Genna dius)卵的捕食行为及各种行为的时间分配。2种瓢虫的捕食过程非常相似,大致可以分为搜寻、取食、清洁、静息、整翅和排泄6个部分。在整个捕食过程中,沙巴拟刀角瓢虫在饥饿状态下,其各行为所占的时间为爬行时间>取食时间>静息时间>清洁时间>猎物处置时间,而在非饥饿状态下,各行为所占的时间为爬行时间>静息时间>取食时间>清洁时间>猎物处置时间;对于越南斧瓢虫来讲,饥饿状态下各行为所占的时间比例为爬行时间>静息时间>取食时间>清洁时间>猎物处置时间,而在非饥饿状态,越南斧瓢虫用在取食方面的时间很少,仅长于处置猎物的时间。2种瓢虫相比,沙巴拟刀角瓢虫用在爬行和取食方面的时间要比越南斧瓢虫长,而用在静息和清洁方面的时间比越南斧瓢虫短。

The predatory behaviors of Serangiella sababensis and Axinoscymnus apioides

The lady beetles Serangiella sababensis Sasaji and Axinoscymnus apioides Kuznetsov and Ren are predators of the whitefly Bemisia tabaci（Gennadius）. The predatory behaviors of these species were recorded in a laboratory with a videocassette recorder. Results show that the predatory behavior of both species was quite similar and could be was categorized into six kinds of behavior; walking,feeding,cleaning,resting,vibrating wings and prey disposal. Starved adults of both S. sababensis and A. apioides were found to spend more time feeding compared to satiated adults. The proportion of time （ in descending order ） spent by starved S. sababensis on each behavior was walking〉 feeding〉 resting 〉cleaning 〉prey disposal,whereas for starved A. apioides the order was walking〉 resting 〉feeding〉 cleaning 〉prey disposal. However,in satiated individuals, the sequence for S. sababensis was walking 〉resting 〉feeding 〉cleaning 〉prey disposal,and that for A. apioides was walking〉 resting〉 cleaning feeding 〉prey disposal. S. sababensis spent more time walking and feeding and less time cleaning and resting than A. apioides.