本文报道了保幼激素类似物methoprene(JHM)对粘虫Mythimna separata(Walker)飞行能力及飞行能源物质含量的影响.总体而言,用JHM(30μg/蛾)处理过的成虫飞行能力比对照(丙酮处理)的弱,但因性别及处理后的时间变化而异:处理雌蛾的飞行能力在处理后的1d到3d与对照没有显著差异,但在4d到6d则显著低于对照;处理雄蛾的飞行能力一直比对照的强,尽管差异不显著.处理过的雌蛾飞行个体比对照的少,而处理过的雄蛾比对照的多.究其原因,主要是JHM处理过的雌蛾甘油酯含量在处理后的3d后明显下降,而处理过的雄蛾甘油酯含量一直比对照的高.但无论是雌蛾还是雄蛾,处理的与对照的糖元含量均没有明显的差异.这些结果表明,作用于成虫体内甘油酯含量是保幼激素影响粘虫飞行能力的主要原因之一.最后,对保幼激素影响粘虫飞行能力的其它可能原因也进行了讨论.%The flight capacity and contents of energy substances in the moths of migratory Oriental armyworm, Mythimna separata(Walker)dosed with juvenile hormone analogue methoprene(JHM)were compared with the normal moth through day-1 to day-6 after the treatment. The flight capacity of JHM-treated moths,as determined by a 12-hours tethered-flight test, was significantly lower than that of the controls, although it might differ with their age and sex. The moth's flight capacity between the treatments was insignificantly different from the first to 3rd day after the treatment but was significantly different from the 4th to 6th day either in the mean flight duration or in distance. Evaluation of the long fliers at the same stages between the treatnents also supported this finding. Flight capacity of the JHM-treated moths also differed with the sex.The JHM-treated female did not fly less than the control from day-1 to day-3, but did significantly less from day-4 to day-6 after the treatment. The flight capacity of the JHM-treated males, however, was not weaker than that of the control throughout the test period. Comparison of the levels of energy substances in the JHMtreated adults and the controls showed that JHM may directly acted on metabolism of glyceride, which in turn affected flight capacity. Furthermore, higher levels of glyceride in the treated male adults raised their flight capacity to a stronger levels than the control in most of the days of tethered-flight test period. Contents of glycogen, however, were insignificantly affected by JHM in both male and female adults. In might therefore be concluded that levels of JH is a critical factor regulationg migratory behavior in the army worm moth. In addition to affect metabolism of glyceride, other possible physiological roles that JH played in determining migrattory behavior are also discussed.
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