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Oviposition site selection in the crepuscular moth, Grapholita molesta: does light matter?

文献类型： 外文期刊

作者： Yang, Xiaofan 1 ; Lu, Ziyun 1 ; Ran, Hongfan 1 ; Ma, Aihong 1 ; Liu, Wenxu 1 ; Li, Jiancheng 1 ; Wei, Guoshu 2 ;

作者机构： 1.Hebei Acad Agr & Forestry Sci, Plant Protect Inst, Minist Agr, Key Lab Integrated Pest Management Crops Northern, Baoding 071000, Hebei, Peoples R China

2.Hebei Agr Univ, Coll Plant Protect, Baoding 071000, Hebei, Peoples R China

关键词： crepuscular moth; dim light; Grapholita molesta; Lepidoptera; light intensity; oviposition site selection; peach tree; pest insect; stone and pome fruit; sunny and shaded; Tortricidae; variable conditions

期刊名称：ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA （ 影响因子：2.433； 五年影响因子：2.28 ）

ISSN： 0013-8703

年卷期： 2022 年 170 卷 5 期

页码：

收录情况： SCI

摘要： Some insects that particularly prefer sunny or shaded sites use light intensity to locate suitable oviposition sites during the day. However, it is not known whether crepuscular species can be guided by light for oviposition under dim or variable light conditions. We used the crepuscular moth Grapholita molesta (Busck) (Lepidoptera: Tortricidae), a major pest of stone and pome fruits worldwide, to investigate oviposition response to light at various intensities (1000, 100, 10, and 1 mW m(-2)). Light intensity in sunny sites in a peach tree canopy is about 10x higher than in shaded sites. In both light vs. dark and brighter light vs. darker light choices, G. molesta females can discriminate differences in light intensity, exhibiting a strong preference for brighter light, independent of light intensity. Moreover, the light-dependent oviposition responses did not change when exposed to odor stimuli. Our findings show that this crepuscular moth G. molesta can use light intensity to direct oviposition toward relatively sunny sites under dim light conditions. This study highlights the importance of vision for crepuscular species in oviposition site selection.

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