茄二十八星瓢虫成虫天花板爬行行为研究

Locomotive behavior of Henosepilachna vigintioctopunctata(Coleoptera:Coccinellidae) adults moving on ceiling substrata

【目的】探明茄二十八星瓢虫Henosepilachna vigintioctopunctata（Fabricius）成虫的天花板爬行行为,为气流控制技术防治农业害虫提供技术参数。【方法】本研究通过采用录像观察法对茄二十八星瓢虫雌雄成虫的天花板爬行行为进行观测,明确其成虫的运动行为参数,并分析了其步速分别与步距、步频和负荷因数的关系。【结果】茄二十八星瓢虫雌雄成虫天花板爬行时的速度为3.77~19.32 mm/s,步距为2.63~4.51 mm,步频范围为1.32~4.74 Hz。步距和步频均与速度之间存在极显著线性关系,速度的增加同时依靠步距和步频的增加,但步距的变化相对步频的变化小;前足、中足和后足的负荷因数均随着速度的提高而降低,且负荷因数均与速度存在显著相关性;一个步态周期内,足的摆动时间均远小于支撑时间。【结论】茄二十八星瓢虫成虫天花板爬行时速度的增加主要是依靠步频的提高来实现。

【Aim】This study aims to elucidate the locomotive behavior of adults of the 28-spotted potato ladybird,Henosepilachna vigintioctopunctata（ Fabricius） moving on ceiling substrata,so as to provide references for pneumatic control technology to be developed and used in prevention and control of agricultural insect pests in China. 【Methods 】 Based on the observation with a Sony camera the locomotive behavior parameters of adult H. vigintioctopunctata moving on ceiling substrata were determined,and the relationship between velocity and stride length,stride frequency and duty factor was analyzed respectively. 【Results】The results showed that H. vigintioctopunctata adults moved at a speed of 3. 77- 19. 32 mm / s,with a stride length of 2. 63- 4. 51 mm,and a stride frequency of 1. 32- 4. 74 Hz on ceiling substrata. The stride length and stride frequency were both significantly affected by speed and increased with increasing velocity,but stride length changed less than stride frequency. The duty factors of each leg were significantly affected by speed and decreased with increasing velocity. In one stride period,the time of the transfer phase was much less than that of the support phase. 【Conclusion】H. vigintioctopunctata adults increase their velocity largely by increasing their stride frequency,compared with the effects of stride length.