温度对美洲斑潜蝇及南美斑潜蝇种群增长的影响

在恒温条件下观察了美洲斑潜蝇和南美斑潜蝇实验种群的发育、存活及繁殖情况,拟合了两种斑潜蝇发育速率与温度之间的关系模型,求出了各发育阶段的发育起点温度及有效积温,组建了不同温度下两种斑潜蝇实验种群的生殖力表,计算了主要的生命表参数.结果表明,温度对两种斑潜蝇的发育、存活、繁殖均有显著的影响,且两种斑潜蝇对温度的适应特性有着明显差异.美洲斑潜蝇适应的温度范围较广,相对较高的温度有利于种群的发育、生存及繁殖;而南美斑潜蝇适应的温度范围相对较窄,且适温范围明显偏低,高温不利于种群的增长;在各自的适温条件下,两种斑潜蝇都有很强的种群增殖能力.

Effect of temperature on the population increase of Liriomyza sativae and Liriomyza huidobrensis(Diptera:Agromyzidae)

Liriomyza sativae Blanchard and Liriomyza huidobrensis Blanchard (Diptera: Agromyzidae) are two small leafmining insects of a wide variety of vegetable and ornamental plants most commonly distributing in temperate areas. The pest status of these two leafminers have dramatically rose worldwide since 1970s with the intensive application of non selective insecticides which led to the elimination of natural enemies, and it is difficult to control them for their polyphagous nature, high fecundity and thei...