平腹小蜂扩散行为与距离的初步研究

对荔枝果园中平腹小蜂的田间扩散行为和扩散距离进行了初步研究,结果表明,平腹小蜂的活动高峰时间是在中午11:00到下午17:00,其主要在60m范围内扩散飞行,少量个体可扩散100m远,这种扩散飞行是不连续式渐进性的;距放蜂点60m以内处植株上寄主卵的寄生率与60m以外的寄生率有明显的差异,故其有效的扩散寄生范围约为60m,而方位和植株的高度对平腹小蜂的扩散和寄生行为没有影响。

Preminary Studies on Dispersal Behavior and Distance of Anastaus japonicus

The dispersal behavior and dispersal distance of adults of Anastatus japonicus in litchi orchard were studied.The results showed that the peak of the wasp's active time was from 11:00 to 17:00,it flew and dispersed mainly within a distance of 60 m from the released point,while only a few individuals had dispersed over 100 m from the releasing point.The wasp's dispersal activity advanced gradually and intermittently.There was significant difference between the parasite rate of host eggs on the litchi trees within 60 m and that over 60 m from the releasing point.So the effective dispersal parasite distance was about 60 m.And there was no effect of space position and plant height in which the host eggs were laid on the dispersal behaviors and parasite behavior of Anastatus japonicus.