Coffee leaf miner (CLM) Leucoptera coffeella stands out as a primary insect pest of arabica coffee plants in some regions of Brazil. Coffee breeding for CLM-resistance has used the species Coffea racemosa as gene donor for C. arabica, resulting in the development of the resistant commercial hybrid ‘Siriema AS1’. However, no previous study has characterized the resistance type, and whether there is variation in the levels expressed in progenies of ‘Siriema’ to CLM. This study aimed to characterize the type, by antixenosis or antibiosis, and the levels of resistance in segregating progenies of ‘Siriema’ plants to CLM. Experiments were conducted under laboratory conditions with artificial infestation of CLM adults in oviposition cages, where dual-choice preference assays compared each tested ‘Siriema’ progeny with the susceptible commercial cv. Arara (C. arabica). A follow-up no-choice assay evaluated five selected ‘Siriema’ progenies on the development of CLM compared to cv. Arara. As main results, ‘Siriema’ progenies were equally susceptible to CLM oviposition, and were overall stimulant relative to cv. Arara. However, there was low CLM larval survival and injury intensity on the selected ‘Siriema’ genotypes, indicating moderate levels of antibiosis-resistance, while cv. Arara and one ‘Siriema’ progeny were moderately susceptible. These findings further our understanding on the type and levels of resistance in ‘Siriema’ genotypes, aiding in the development of resistant coffee hybrids and deployment of management strategies to CLM.

咖啡叶矿工 （CLM） Leucoptera coffeella 在巴西的一些地区是阿拉比卡咖啡植物的主要害虫。针对 CLM 抗性的咖啡育种使用总状咖啡物种作为阿拉比卡咖啡的基因供体，导致抗性商业杂交种“Siriema AS1”的发展。然而，以前的研究没有描述耐药类型，以及 'Siriema' 的后代对 CLM 的表达水平是否存在差异。本研究旨在通过抗毒或抗菌来表征类型，以及分离 'Siriema' 植物后代对 CLM 的抗性水平。在实验室条件下对产卵笼中 CLM 成虫进行人工感染的实验，其中双重选择偏好测定将每个测试的 'Siriema' 后代与易感的商业 cv. Arara （C. arabica).一项后续的无选择测定评估了 5 个选定的 'Siriema' 后代与 cv. Arara. 相比对 CLM 发展的影响。作为主要结果，'Siriema' 后代同样易受 CLM 产卵的影响，并且相对于 cv. Arara 总体上是兴奋剂。然而，在选定的 'Siriema' 基因型上，CLM 幼虫存活率和损伤强度较低，表明抗菌素耐药性水平适中，而 cv.Arara 和一个 'Siriema' 后代中度易感。这些发现进一步加深了我们对 'Siriema' 基因型的抗性类型和水平的理解，有助于开发抗性咖啡杂交种和部署 CLM 的管理策略。