1. The giant willow aphid (Tuberolachnus salignus) is an invasive pest that can attain large populations on willows (Salix spp.). This has the potential to have a negative impact on the extensive use of willows for soil conservation, and as a source of pollen and nectar for honey bees in New Zealand.
2. A willow nursery field trial was established to evaluate the aphid populations, and the survival and growth of young plants of several willow species and hybrids, during two growing seasons from planting.
3. The willow species and hybrids varied widely in their susceptibility to the aphid, with large aphid populations and plant mortality in the most susceptible willows, and reductions in plant growth in all but aphid-resistant willows. The effects on the plants were not seen in the first season, but occurred during the second season.
4. The aphid can be expected to have some negative impacts in New Zealand, with reductions in growth of some willows commonly used for soil conservation, and for pollen and nectar for honey bees.

中文翻译：

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柳巨蚜（Tuberolachnus salignus）及其对柳树成活生长的影响

1. 巨柳蚜虫 ( Tuberolachnus salignus ) 是一种入侵性害虫，可以在柳树 ( Salix spp. )上大量繁殖。这有可能对柳树广泛用于土壤保持以及作为新西兰蜜蜂的花粉和花蜜来源产生负面影响。
2. 建立了柳树苗圃田间试验，以在种植后的两个生长季节评估蚜虫种群以及几种柳树种和杂交种的幼苗的存活和生长。
3. 柳树种和杂交种对蚜虫的易感性差异很大，最易感的柳树有大量的蚜虫种群和植物死亡率，而除抗蚜虫的柳树外，其他所有柳树的植物生长都减少。对植物的影响在第一季未见，但发生在第二季。
4. 预计蚜虫会对新西兰产生一些负面影响，一些常用于土壤保持的柳树以及蜜蜂的花粉和花蜜的生长会减少。