【摘要】 【目的】花绒寄甲Dastarcushelophoroides是天牛类林木蛀干害虫的主要天敌昆虫,为提升花绒寄甲的人工繁育技术和繁育质量,在不同环境温度下,测试了不同体型大小的花绒寄甲对成虫死亡率和产卵量的影响。【方法】按成虫体型大小将花绒寄甲分成较大、较小和中等3组,根据前期不同温度下的饲养经验,分别测试成虫在20、24和28℃下的存活率和产卵量。【结果】体型相同的个体随环境温度升高死亡率增加;20℃时体型小的死亡率高,24℃和28℃各组死亡率无显著性差异;中等个体组在24℃和28℃下的产卵量大于在20℃下的产卵量;同一温度条件下,体型显著影响雌虫的产卵量,体型大者产卵量高。【结论】体型大小对成虫死亡率影响不明显,但对产卵量有较大影响。更多还原

【Abstract】 [Objectives] Dastarcus helophoroides is an important insect predator of wood borers, especially cerambycids. This paper tests the influence of adult body size on the mortality rate and fecundity of adult D. helophoroides in order to improve the mass husbandry of this species. [Methods] D. helophoroides adults were divided into three groups according to body size; small, medium and large and the survival rates and fecundities of these groups were recorded at 20, 24 and 28 ℃, respectively. [Results] Mortality increased with temperature for adults in the same body size group. Mortality rates did not differ significantly among the three groups at 24 ℃ and 28 ℃, but did at 20 ℃, at which temperature mortality was significantly higher in the small group. Temperature had a significant effect on fecundity in the medium group; fecundity was higher at 24 ℃ and 28 ℃ than that at 20 ℃. Fecundity varied significantly with body size; at the same temperature, the large group had the highest fecundity. [Conclusion] Body size did not significantly affect the mortality of D. helophoroides adults but did affect fecundity.更多还原