Manley Megan, Melzer Michael J, Spafford Helen
Department of Plant and Environmental Protection Sciences, University of Hawai'i at Mānoa, Honolulu, HI 96822, USA.
Insects. 2018 Oct 15;9(4):141. doi: 10.3390/insects9040141.
The coconut rhinoceros beetle (CRB), (L.) (Coleoptera: Scarabaeidae), has become one of the most important coconut and oil palm pests. This species was detected attacking coconut palms on O'ahu, Hawai'i in December 2013, and an eradication program was initiated. One of the major challenges for eradication has been the identification of new breeding sites. Information on the factors influencing oviposition is needed to aid in finding sites likely to host the immature stages of this insect. In this study, a series of choice tests were conducted to assess the oviposition preferences of both laboratory-reared and wild-caught CRB. Mated females, of both lab-reared and wild-caught beetles, were offered for oviposition a choice between sand and two mulch substrates, one with small and one with large particle sizes. Both types of CRB laid eggs preferentially in substrate of small particle size rather than large and none laid eggs in sand. Lab-reared and wild-caught CRB differed in their oviposition behavior and size. These results can be used to aid in the identification of breeding sites for management programs and eradication efforts.
椰心叶甲（学名：Brontispa longissima (Gestro) ，鞘翅目：金龟子科）已成为椰子树和油棕树最重要的害虫之一。2013年12月，在夏威夷瓦胡岛发现该物种对椰子树发起攻击，随后启动了根除计划。根除工作面临的主要挑战之一是识别新的繁殖地点。需要了解影响产卵的因素，以帮助找到可能存在该昆虫未成熟阶段的地点。在本研究中，进行了一系列选择试验，以评估实验室饲养和野外捕获的椰心叶甲的产卵偏好。向实验室饲养和野外捕获的已交配雌虫提供在沙子和两种覆盖物基质之间进行产卵选择的机会，其中一种覆盖物基质颗粒小，另一种颗粒大。两种类型的椰心叶甲都优先在小颗粒基质中产卵，而非大颗粒基质，并且没有一只在沙子中产卵。实验室饲养和野外捕获的椰心叶甲在产卵行为和体型上存在差异。这些结果可用于帮助识别管理计划和根除工作中的繁殖地点。
