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首页> 外文期刊>Journal of Insect Science >Oviposition Preference and Offspring Performance of Mechoris ursulus (Coleoptera: Attelabidae) in Cyclobalanopsis glaucoides (Fagales: Fagaceae) and Quercus franchetii (Fagales: Fagaceae) in Central Yunnan, China
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Oviposition Preference and Offspring Performance of Mechoris ursulus (Coleoptera: Attelabidae) in Cyclobalanopsis glaucoides (Fagales: Fagaceae) and Quercus franchetii (Fagales: Fagaceae) in Central Yunnan, China

机译：中国云南中部的青草鱼（Mechoris ursulus（Coleoptera：Attelabidae））在青冈青冈（Fagales：Fagaceae）和栎栎（Quercus franchetii）（Fagales：Fagaceae）中的产卵倾向和后代表现

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摘要

Mechoris ursulus (Roelofs) (Coleoptera: Attelabidae) is a pest weevil of Fagaceae oak trees in eastern Asia. The female has a distinct branch-cutting behavior in conjunction with oviposition in the acorns of its host plant. This study analyzed the factors influencing oviposition preference by carrying out continuous field surveys over the course of 2009–2010 and through laboratory rearing. The field survey showed that for both of the hosts, Cyclobalanopsis glaucoides Schottky (Fagales: Fagaceae) and Quercus franchetii Skan, M. ursulus preferred branches with fewer acorns and larger acorns on the same branch for oviposition. Laboratory rearing experiments showed offspring performance (i.e., survival rate and fresh weight of larvae) was significantly and positively correlated with acorn size. Preference for larger acorns could maximize the fitness of offspring by providing sufficient food source and space.
机译：Mechoris ursulus（Roelofs）（鞘翅目：Attelabidae）是东亚的菊科橡树的害虫象鼻虫。雌性在其寄主植物的橡子中具有明显的分枝行为以及产卵。本研究通过在2009–2010年期间进行连续的田间调查并通过实验室饲养来分析影响排卵偏好的因素。田间调查表明，对于这两个寄主，Cyclobalanopsis glaucoides Schottky（Fagales：Fagaceae）和Quercus franchetii Skan，M。ursulus偏爱橡子较少，较大的橡子在同一分支上进行产卵。实验室饲养实验表明，后代的性能（即成虫的存活率和鲜重）与橡子大小显着正相关。通过提供足够的食物来源和空间，偏爱较大的橡子可以最大程度地提高后代的适应性。

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