Cyst nematodes are among the major plant-parasitic nematodes worldwide, and they cause significant damage to Brassicaceae crops, including Kimchi-cabbage, in Korea. To survey the incidence of cyst nematodes in Kimchi-cabbage fields, 469 soil samples were collected from the main producing areas between 2018 and 2021. Only cyst nematodes belonging to the genus Heterodera were investigated, and the overall nematode incidence was found to be 40%. Regionally, the highest incidence was observed in Taebaek, reaching 89%, with mean densities of cysts and eggs per 500 cm³ of soil recorded at 522 and 49,734, respectively. Based on Bayesian analysis of the mitochondrial DNA cytochrome c oxidase subunit I gene sequence, the cyst nematodes were identified as four species: clover cyst nematode (Heterodera trifolii, HT, frequency: 78%), soybean cyst nematode (H. glycines, HG, 11%), sugar beet cyst nematode (H. schachtii, 4%), and white soybean cyst nematode (H. sojae, HSo, 2%). Mixed infestations were found in some fields, with HT + HG (4%) and HG + HSo (1%). These results indicate that HT is the dominant species in the main Kimchi-cabbage producing areas in Korea. In conclusion, implementing effective HT management strategies is critical to minimize economic losses in Kimchi-cabbage production in Korea.

Keywords: Kimchi-cabbage; cyst nematodes; incidence.

根结线虫是全球主要的植物寄生线虫之一，它们对包括韩国泡菜白菜在内的十字花科作物造成了显著损害。为了调查泡菜白菜田中根结线虫的发生情况，在2018年至2021年间从主要生产区域收集了469个土壤样本。研究只关注属于异皮线虫属（Heterodera）的根结线虫，总体上发现线虫的发生率为40%。在地区层面上，太平地区的发生率最高，达到了89%，平均每500立方厘米土壤中的囊和卵数量分别为522个和49,734个。基于对线粒体DNA细胞色素c氧化酶亚基I基因序列的贝叶斯分析，确定了四种根结线虫物种：三叶草根结线虫（Heterodera trifolii，HT，频率：78%）、大豆根结线虫（H. glycines，HG，11%）、甜菜根结线虫（H. schachtii，4%）和白大豆根结线虫（H. sojae，HSo，2%）。在一些田地中发现了混合感染的情况，分别为HT + HG (4%) 和 HG + HSo (1%)。这些结果表明，在韩国主要的泡菜白菜生产区域中，HT是占主导地位的物种。总之，实施有效的HT管理策略对于减少韩国泡菜白菜生产的经济损失至关重要。

关键词：泡菜白菜；根结线虫；发生率。