ABSTRACT The first records of Tuberolachnus salignus (Gmelin), the giant willow aphid, were reported from New Zealand and Australia in December 2013 and March 2014 respectively. The host plants are various members of Salix and Populus. The pathway used by the aphid to enter Australasia remains unknown, but natural aerial dispersal across the Tasman Sea is proposed to explain its first appearance within 3 months in Australia and New Zealand. Previous examples of aphids crossing the Tasman Sea are summarised. Windborne transmission due to the predominantly westerly winds from Australia to New Zealand is more likely based on past experience. However, we demonstrate using the HYSPLIT air trajectory model that it is possible that the aphid was carried on a reverse trajectory from New Zealand to southern Tasmania. Without more regular and systematic surveillance of New Zealand and Australian insect biota, it will continue to be difficult to ascertain the timing, origin and dispersal pathways of introduced insects.

中文翻译：

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巨柳蚜虫 Tuberolachnus salignus (Gmelin)（半翅目：蚜科：Lachninae）从新西兰向西传播到澳大利亚

摘要 新西兰和澳大利亚分别于 2013 年 12 月和 2014 年 3 月报道了巨柳蚜虫 Tuberolachnus salignus (Gmelin) 的首次记录。寄主植物是柳属和杨属的各种成员。蚜虫进入澳大拉西亚的途径仍然未知，但有人提出通过塔斯曼海的自然空中散布来解释它在 3 个月内首次出现在澳大利亚和新西兰的原因。总结了以前蚜虫穿越塔斯曼海的例子。根据过去的经验，从澳大利亚到新西兰的主要西风导致的风传播更有可能。然而，我们使用 HYSPLIT 空气轨迹模型证明，蚜虫可能是从新西兰到塔斯马尼亚南部的反向轨迹。