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A survey of plant parasitic nematodes was carried out in 650 garlic fields in Korea from 2020 to 2022. Migratory endoparasite nematodes (<i>Ditylenchus</i> sp.) were recovered from 6% of the garlic samples, with an average density of 494 individuals per garlic bulb. The morphological characteristics of males and females from the 2022 survey were very similar to <i>D. destructor</i>, but <i>D. dipsaci</i> was not found. The Korean population traits have a lateral field containing six incisures, and the posterior esophagus part overlaps the intestine dorsally. PCR and DNA sequencing were performed for the D2/D3 region of the ribosomal DNA 28S and the ITS region, and the phylogenetic analysis strongly supports the monophyly of <i>D. destructor</i>. This is the first report of <i>D. destructor</i> parasitizing garlic in the Republic of Korea. In Korea, due to changes in agricultural or environmental conditions, the most damaging potential PPNs changed from <i>D. dipsaci</i> to <i>D. destructor</i> in garlic cultivation.