Hawaii has a multitude of scolytine (Coleoptera: Curculionidae: Scolitinae) pests including Hypothenemus hampei, coffee berry borer, which is apest of coffee, Hypothenemus obscurus, tropical nut borer, a significant pest of macadamia nut, and Xylosandrus compactus, black twig borer, a pest of many tropical and ornamental crops. The flat bark beetles, Carthartus quadricollis (Coleoptera: Silvanidae) and Leptophloeus sp. (Coleoptera; Laemophloeidae), are known to predate on coffee berry borer and tropical nut borer but their natural history (feeding habits, reproduction and movement) are poorly understood. Studies were conducted using molecular, field, and laboratory assays to examine 1) flat bark beetle reproduction and movement in coffee and the broader agricultural landscape, 2) establishment of augmentative releases for biological control, and 3) predation rates on H. hampei, H. obscurus and X. compactus. Various life stages of C. quadricollis and Leptophloeus sp. were found in seven different plant species common to the agricultural landscape around coffee farms, suggesting these predators are feeding and reproducing on theses hosts. Molecular analysis indicated that C. quadricollis and Leptophloeus sp. predated on H. hampei, H. obscurus and X. compactus in coffee, macadamia nut, and mixed coffee-macadamia nut farms. Laboratory reared predators were recaptured near release sites on coffee farms at 1, 2, and 7 weeks after augmentative releases. Predation of C. quadricollis on H. hampei eggs placed inside artificial coffee berries in coffee farms was about 40%. Predators C. quadricollis and Leptophloeus sp. are natural enemies of some significant agricultural scolytine pests in Hawaii and have excellent potential for biological control with augmentative releases.

中文翻译：

---

掠食性扁平树皮甲虫 Cathartus quadriccollis（鞘翅目：Silvanidae）和 Leptophloeus sp. 的摄食习性、运动和繁殖。（鞘翅目：Laemophloeidae）在夏威夷咖啡和澳洲坚果中

夏威夷有多种蝾螈（鞘翅目： Curculionidae： Scolitinae ）害虫，包括 Hypothenemus hampei、咖啡果螟、Hypothenemus obscurus、热带坚果螟、澳洲坚果的重要害虫和 Xylosandrus compactus、黑枝螟，许多热带和观赏作物的害虫。扁平树皮甲虫，Carthartus quadriccollis（鞘翅目：Silvanidae）和Leptophloeus sp。（鞘翅目；Laemophloeidae），已知早于咖啡浆果蛀虫和热带坚果蛀虫，但它们的自然历史（摄食习惯、繁殖和运动）知之甚少。使用分子、现场和实验室分析进行了研究，以检查 1) 扁平树皮甲虫在咖啡和更广泛的农业景观中的繁殖和运动，2) 建立用于生物控制的增强释放，和 3) H. hampei、H. obscurus 和 X. compactus 的捕食率。C. quadriccollis 和 Leptophloeus sp. 的不同生命阶段。在咖啡农场周围的农业景观中常见的七种不同的植物物种中发现了它们，这表明这些捕食者正在这些宿主身上觅食和繁殖。分子分析表明 C. quadriccollis 和 Leptophloeus sp。在咖啡、澳洲坚果和混合咖啡-澳洲坚果农场中早于 H. hampei、H. obscurus 和 X. compactus。在增加释放后 1、2 和 7 周，实验室饲养的捕食者在咖啡农场的释放点附近被重新捕获。C. quadriccollis 对放置在咖啡农场人工咖​​啡浆果内的 H. hampei 卵的捕食率约为 40%。捕食者 C. quadriccollis 和 Leptophloeus sp。