Abstract：
Specialization is an important attribute of a biological control agent. The maritime pine bast scale, Matsucoccus feytaudi Ducasse (Hemiptera Matsucoccidae), is an invasive species in Southeast France and the North of Italy. Iberorhyzobius rondensis Eizaguirre (Coleoptera: Coccinellidae), is a recently described ladybird species. Both adults and larvae are predaceous, feeding on egg masses of M. feytaudi, and are strongly attracted to M. feytaudi\'s sex pheromone. To evaluate the potential of I. rondensis as a biocontrol agent of the scale, we studied its niche breadth and prey range with emphasis on pine forests and hemipterans as tested prey. In this study, I. rondensis was found to achieve complete development only when fed on M. feytaudi egg masses (92.9% survival) and an artificial prey: eggs of Ephestia kuehniella Zeller (27.6% survival). From the 2nd instar onwards, complete development could be achieved using other prey species, although larvae had significantly higher mortality and slower development. In choice tests, M. feytaudi was the preferred prey. Surveys of the ladybird populations in the Iberian Peninsula revealed that it was found exclusively on Pinus pinaster Aiton, the sole host of M. feytaudi. The unusual specialization of I. rondensis, among other predaceous ladybirds, makes it an appropriate candidate for classical biological control of M. feytaudi.
摘要：
专业化是生物控制剂的重要属性。海洋松树韧皮规模，松藻（松翅目半翅目），是法国东南部和意大利北部的入侵物种。IberorhyzobiusrondensisEizaguirre（鞘翅目：球藻科），是最近描述的瓢虫物种。成虫和幼虫都是早熟的，以M.feytaudi的蛋团为食，并且被M.Feytaudi的性信息素强烈吸引。为了评估I.rondensis作为规模的生物防治剂的潜力，我们研究了其生态位宽度和猎物范围，重点是松树林和半翅目动物作为测试猎物。在这项研究中,I.只有以M.feytaudi卵量（92.9％的存活率）和人工猎物：EphestiakuehniellaZeller的卵（27.6％的存活率）为食，才能实现完全发育。从第二龄开始，使用其他猎物物种可以实现完整的发育，尽管幼虫的死亡率明显较高，发育较慢。在选择测试中，M.Feytaudi是首选猎物。对伊比利亚半岛瓢虫种群的调查显示，它仅在PinuspinasterAiton上发现，Feytaudi先生的唯一主人.I.rondensis不同寻常的专业化，在其他食草瓢虫中，使其成为经典生物防治M.feytaudi的合适候选者。
