Bonsignore Carmelo Peter, Jones Therésa Melanie
Dipartimento Patrimonio Architettonico e Urbanistico PAU, Laboratorio di Entomologia ed Ecologia Applicata, Università Mediterranea di Reggio Calabria, Salita Melissari, Reggio Calabria, Italy.
Insect Sci. 2014 Apr;21(2):203-12. doi: 10.1111/1744-7917.12035. Epub 2013 Jul 15.
An understanding of the relative importance of extrinsic and intrinsic factors in determining the potential distribution and mating success of individuals is critical for the successful monitoring and management of pest species. Using a combination of field observations and a caged field experiment, we explored the roles of environmental and individual variation on the formation of mating aggregations and mating success in the buprestid beetle Capnodis tenebrionis (Linnaeus, 1767), a pest species of stone fruit trees. Our field observations revealed that the formation of aggregations is influenced by a range of environmental factors including temperature, photoperiod, and population density. However, aggregations were not at random and were more likely to occur on the section of the plant with highest incidence of solar radiation and thus higher temperatures. Data from our experiment with caged beetles in the field further indicate that the reproductive behavior of this species varies with temperature. The probability of a successful mating occurring was also positively related to both male and female size. Females of C. tenebrionis mate several times over a 4-h period, but generally not with the same male. Information obtained from these studies is useful to define the most appropriate time for pest control, especially adopting strategies that interfere with reproduction.
了解外在因素和内在因素在决定个体潜在分布和交配成功率方面的相对重要性，对于有害生物物种的成功监测和管理至关重要。我们结合实地观察和田间笼养实验，探讨了环境和个体变异在蛀干害虫十星瓢萤叶甲（Capnodis tenebrionis，Linnaeus，1767）交配聚集形成和交配成功中的作用，十星瓢萤叶甲是核果类果树的一种害虫。我们的实地观察表明，聚集的形成受一系列环境因素影响，包括温度、光周期和种群密度。然而，聚集并非随机发生，更有可能出现在太阳辐射发生率最高且温度较高的植株部位。我们在田间对笼养甲虫进行实验得到的数据进一步表明，该物种的繁殖行为随温度变化。成功交配的概率也与雄性和雌性的体型呈正相关。十星瓢萤叶甲的雌虫在4小时内会多次交配，但通常不会与同一只雄虫交配。从这些研究中获得的信息有助于确定最适宜的害虫防治时间，特别是采用干扰繁殖的策略。
