Abstract The polyphagous predator Orius species is a dominant predator of thrips, mites, and aphids. Orius laevigatus (Fieber) is a well-known commercialized and effective biological control agent, whereas Orius minutus (L.) distributed widely over the world has not been commercialized. To assess potentials of developing O. minutus as a commercial biological control agent, we compared the biological parameters of O. minutus with O. laevigatus when reared on mixed stages of Tetranychus urticae Koch at 27.5°C. Nymphal development of O. laevigatus was shorter (11.30 d) than that of O. minutus (12.25 d), but there was no significant difference in survivorship between the two species. Also, no significant difference was found in either the preoviposition or oviposition periods, lifetime fecundity, or longevity between the two species. However, O. minutus eggs had a higher hatch rate (0.77) than O. laevigatus (0.71). In life table analysis, no difference was found in any parameters, i.e., R0, rm, λ, T, and DT, between O. laevigatus and O. minutus in two-tailed t-tests. In a predation bioassay, O. minutus consumed 1.39 times more adult T. urticae in 24 h than did O. laevigatus, although the predation rate on T. urticae eggs was similar between the two species. These results suggest that O. minutus native to Korea could be developed as a biological control agent against T. urticae.

中文翻译：

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Orius minutus (Hemiptera: Anthocoridae) 和 O. laevigatus 的发育和繁殖力 饲养在 Tetranychus urticae (Acari: Tetranychidae)

摘要 杂食性捕食者 Orius 物种是蓟马、螨类和蚜虫的主要捕食者。Orius laevigatus (Fieber) 是一种众所周知的商业化和有效的生物防治剂，而在世界范围内广泛分布的 Orius minutus (L.) 尚未商业化。为了评估将 O. minutus 开发为商业生物防治剂的潜力，我们比较了 O. minutus 和 O. laevigatus 在 27.5°C 下在荨麻叶螨 Koch 的混合阶段饲养时的生物学参数。O. laevigatus 的若虫发育时间（11.30 d）短于 O. minutus 的（12.25 d），但两个物种的存活率没有显着差异。此外，两个物种在产卵前或产卵期、终生繁殖力或寿命方面均未发现显着差异。然而，O。minutus 卵的孵化率 (0.77) 高于 O. laevigatus (0.71)。在生命表分析中，在双尾 t 检验中，O. laevigatus 和 O. minutus 之间的任何参数，即 R0、rm、λ、T 和 DT，均未发现差异。在捕食生物测定中，O. minutus 在 24 小时内消耗的成年 T. urticae 是 O. laevigatus 的 1.39 倍，尽管这两个物种对 T. urticae 卵的捕食率相似。这些结果表明，原产于韩国的 O. minutus 可以开发作为抗荨麻疹的生物防治剂。laevigatus，尽管这两个物种对 T. urticae 卵的捕食率相似。这些结果表明，原产于韩国的 O. minutus 可以开发作为抗荨麻疹的生物防治剂。laevigatus，尽管这两个物种对 T. urticae 卵的捕食率相似。这些结果表明，原产于韩国的 O. minutus 可以开发作为抗荨麻疹的生物防治剂。