The release of Tamarixia triozae (Burks) (Hymenoptera: Eulophidae), a parasitoid of the potato psyllid, Bactericera cockerelli (Šulc) (Hemiptera: Triozidae), resulted in the successful establishment of the parasitoid in New Zealand. The parasitoid was released at more than 30 sites by the final year of the three-year study throughout New Zealand. Its continued presence over the three-year study was confirmed in two regions (Hawke’s Bay and Canterbury). At one site in Canterbury, the parasitoid was released only in the first summer of this study (Nov. 2017–Feb. 2018). It was recovered from potato psyllid infested African boxthorn (Lycium ferocissimum Miers) foliage in the second and third summers at this site, demonstrating the parasitoid’s ability to survive over successive winters. We found T. triozae parasitized nymphs at 24 sites of the 86 potato psyllid host plant sites surveyed within a 25 km radius of known release sites in Hawke’s Bay. The parasitoid was found up to 24 km from the nearest known release site in Hawke’s Bay. In Canterbury, the parasitoid was found up to 0.6 km from a known release site. Parasitism rates of 13.7–15.6% were estimated based on two post-release survey methods employed in this study. The parasitoid also feeds on psyllid nymphs so its establishment may lead to helping to reduce or delay potato psyllid populations from reaching damaging levels. Long-term monitoring is needed to determine the consequences of importing T. triozae on populations of potato psyllid.

马铃薯木虱Bactericera cockerelli (Šulc)（半翅目：Triozidae）的寄生蜂Tamarixia triozae (Burks )（膜翅目：Eulophidae）的释放导致新西兰寄生蜂的成功建立。到新西兰为期三年的研究的最后一年，寄生蜂在 30 多个地点被释放。在为期三年的研究中，它在两个地区（霍克斯湾和坎特伯雷）的持续存在得到证实。在坎特伯雷的一个地点，寄生蜂仅在本研究的第一个夏天（2017 年 11 月至 2018 年 2 月）被释放。它是从马铃薯木虱感染的非洲黄芪（Lycium ferocissimumMiers）在该地点的第二个和第三个夏天的叶子，证明了寄生蜂在连续的冬季中生存的能力。我们在霍克斯湾已知释放地点 25 公里半径范围内调查的 86 个马铃薯木虱寄主植物地点的 24 个地点发现了T. triozae寄生若虫。这只拟寄生物被发现距离霍克斯湾最近的已知释放地点 24 公里。在坎特伯雷，寄生蜂被发现距离已知的释放地点最远 0.6 公里。根据本研究中采用的两种释放后调查方法，估计寄生率为 13.7–15.6%。寄生蜂还以木虱若虫为食，因此它的建立可能有助于减少或延缓马铃薯木虱种群达到破坏性水平。需要长期监测以确定进口的后果T. triozae对马铃薯木虱种群的影响。