To evaluate the infection risk of Anoplophora malasiaca (Thomson) (Coleoptera: Cerambycidae) in two species of Japanese pine bonsais (Japanese black pine and Japanese white pine), feeding and oviposition preferences of female A. malasiaca to pine bonsai and mandarin orange were examined. A female was released into a net cage together with a pair of one pine bonsai and one mandarin orange. All mandarin oranges used in preference tests were damaged by feeding and deep biting scars from females, and larval frass ejection from the trunk was found in some mandarin oranges within 4 months of observation. However, these scars were found on only a few pine bonsais, and frass ejection was not found in any pine bonsais. No A. malasiaca larvae were detected in these pine bonsais. Therefore, frass ejection from trunks might be indicative of the presence of larvae. In field surveys at bonsai nurseries, no A. malasiaca adults were found on the pine bonsais and no pine bonsais exhibited frass ejection. Statistical analyses of these results suggested that the risk of A. malasiaca infestation in pine bonsais could be ruled out as a negligible level by confirming an absence from the trunk of frass ejection.

中文翻译：

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检查 frass 喷射可以将日本松盆景的白斑长角甲虫 Anoplophora malasiaca（鞘翅目：天牛科）侵染的风险降低到可以忽略不计的水平

为了评估两种日本松盆景（日本黑松和日本白松）中 Anoplophora malasiaca (Thomson)（鞘翅目：天牛科）的感染风险，研究了雌性 A. malasiaca 对松树盆景和橘子的取食和产卵偏好. 一只雌性与一对松树盆景和一个橘子一起被释放到网笼中。所有用于偏好测试的橘子都因雌性的进食和深咬伤疤痕而受损，并且在观察的 4 个月内在一些橘子中发现了幼虫从树干中排出。然而，这些疤痕只在少数松树盆景上发现，在任何松树盆景中都没有发现碎屑喷射。在这些松树盆景中未检测到 A. malasiaca 幼虫。所以，从树干中排出的粪便可能表明幼虫的存在。在盆景苗圃实地调查中，松树盆景上未发现黄曲霉成虫，松树盆景也没有出现黄体弹射现象。对这些结果的统计分析表明，通过确认从树干中不存在排泄物，可以将 A. malasiaca 侵染松树盆景的风险排除在可忽略的水平上。