1-Decanol (Decyl alcohol) is a nematicidal agent derived from Houttuynia cordata, with an LC50 of 31.5 µg/mL against potato cyst nematodes (PCN). 1-decanol directly damages nematode surface structures, induces cellular apoptosis, and disrupts the oxidative stress regulation system, while also downregulating defense-related metabolic pathways in potato, thereby promoting the reallocation of metabolic resources from defense to growth. 1-Decanol can be used for the research of potato cyst nematode infestation[1][2].