Khallaf Mohammed A, Sadek Medhat M, Anderson Peter
Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Alnarp, Sweden.
Department of Zoology and Entomology, Faculty of Science, Assiut University, Assiut, Egypt.
iScience. 2023 Jan 28;26(2):106077. doi: 10.1016/j.isci.2023.106077. eCollection 2023 Feb 17.
Unlike mammals, most invertebrates provide no direct parental care for their progeny, which makes a well-selected oviposition site crucial. However, little is known about the female evaluation of opportunities and threats during host selection. Leveraging the wide range of host plants used by the polyphagous pest, , we investigate oviposition choice between two plants of different nutritional quality. Females prefer to lay their eggs on the host plant, which has inferior larval development and more natural enemies but provides lower predation rates. On the superior host plant, a major predator shows more successful search behavior and is more attracted to herbivore-induced volatiles. Our findings show that predator efficacy and odor-guided attraction, rather than predator abundance, determine enemy free space. We postulate that predators' behaviors contribute to the weak correlation between preference and performance during host plant selection in and in polyphagous insects in general.
与哺乳动物不同，大多数无脊椎动物不会直接照料它们的后代，这使得精心选择产卵地点至关重要。然而，关于雌性在宿主选择过程中对机会和威胁的评估却知之甚少。利用多食性害虫使用的广泛宿主植物范围，我们研究了在两种营养质量不同的植物之间的产卵选择。雌性更喜欢在宿主植物上产卵，这种植物幼虫发育较差且有更多天敌，但捕食率较低。在优质宿主植物上，一种主要捕食者表现出更成功的搜索行为，并且对草食动物诱导的挥发物更有吸引力。我们的研究结果表明，捕食者的效能和气味引导的吸引力，而不是捕食者的数量，决定了无天敌空间。我们推测，捕食者的行为导致了在[具体物种名称]以及一般多食性昆虫的宿主植物选择过程中，偏好与表现之间的弱相关性。
