ABSTRACT The perception of Leptospermum scoparium (mānuka) in New Zealand has changed from a weed to a valued shrub over the last half century due to the economic benefits of mānuka honey. The scale insect Acanthococcus orariensis (Hoy) (Hemiptera: Eriococcidae), an accidental control agent of L. scoparium that caused the mānuka blight mass dieback in the 1940s, initially was common, but declined once the entomogenous fungus Angatia thwaitesii (Petch) Arx (Fungi: Myriangiaceae) appeared. Subsequently, Acanthococcus campbelli (Hoy) and Acanthococcus leptospermi (Maskell) appear to have replaced Ac. orariensis in the last few decades, but there is limited knowledge on their current distribution. The distribution of Acanthococcus species on L. scoparium was determined at 28 sites throughout New Zealand. The most widespread species was Ac. leptospermi, which was found at 23 sites, whereas Ac. campbelli was found at 13 sites, and Ac. orariensis at just two sites. It appears that Ac. leptospermi is now the most common Acanthococcus species on New Zealand Leptospermum, and the blight caused by Ac. orariensis has not returned.

中文翻译：

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近七十年来新西兰 mānuka（Leptospermum scoparium；桃金娘科）介壳虫物种（Coccomorpha：Eriococcidae）的组成变化

摘要 在过去的半个世纪里，由于麦卢卡蜂蜜的经济效益，新西兰对 Leptospermum scoparium (mānuka) 的看法已经从杂草变成了一种有价值的灌木。介壳虫 Acanthococcus orariensis (Hoy) (Hemiptera: Eriococcidae) 是 L. scoparium 的意外控制剂，在 1940 年代引起了麦卢卡疫病大规模枯死，最初很常见，但一旦虫源真菌 Angatia thwaitesii (Petch) Arx（真菌：Myriangiaceae) 出现。随后，Acanthococcus campbelli (Hoy) 和 Acanthococcus leptospermi (Maskell) 似乎已经取代了 Ac。orariensis 在过去的几十年中，但对它们目前的分布知之甚少。在新西兰的 28 个地点确定了棘球蚴在 L. scoparium 上的分布。分布最广的物种是Ac。钩端螺旋体，这是在 23 个站点中发现的，而 Ac。在 13 个地点发现了坎贝利，而 Ac。orariensis 仅在两个地点。看来，Ac。Leptospermi 现在是新西兰 Leptospermum 上最常见的棘球菌属物种，以及由 Ac 引起的枯萎病。orariensis 没有回来。