The walnut husk fly (Rhagoletis completa) is one of the main pests affecting common walnut in both Europe and America. This work examines the effects of abamectin on the development of walnut husk fly larvae by injecting the product Vertimec 1.8 EC (Syngenta) into the trunks of walnut trees in Hungary. In the case of properly injected trees, the infection rate was negligible and the abamectin content in the husk samples ranged between 1.54 and 3.00 ng/g; controls show a very high (> 90%) infestation rate and an abamectin content under the detection limit. Abamectin residue measured in walnut kernel did not exceed the maximum residue limit; moreover, the active ingredient content was below the detection limit (0.0003 mg/kg) in all the collected kernel samples. Our results confirm that trunk injection is a viable method for walnut pest control.

核桃果壳蝇（Rhagoletis completa）是影响欧美普通核桃的主要害虫之一。通过将产品Vertimec 1.8 EC（Syngenta）注入匈牙利的核桃树树干中，这项工作研究了阿维菌素对核桃果壳蝇幼虫发育的影响。在适当注入树木的情况下，感染率可忽略不计，果皮样品中阿维菌素的含量在1.54至3.00 ng / g之间。对照显示出很高的侵染率（> 90％），并且阿维菌素含量低于检出限。核桃仁中阿维菌素残留量未超过最大残留限量；此外，在所有收集的谷粒样品中，活性成分含量均低于检出限（0.0003 mg / kg）。我们的结果证实，树干注射是控制核桃害虫的可行方法。