A survey for plant-parasitic nematodes (PPN) in 33 sugarcane fields was conducted to elucidate the relationship between the yield loss of sugarcanes (Saccharum spp.) and damage caused by PPNs in Tanegashima Island, Japan. Ring, root knot (dominant species; Meloidogyne incognita), lesion (dominant species; Pratylenchus zeae), spiral, stunt, reniform, stubby root, and dagger nematodes were detected in soil samples obtained from these sugarcane fields near harvest time by both the Baermann and the sugar-flotation extraction methods. Furthermore, model selection for sugarcane yield (t/10 a), with parameters including PPNs detected in this survey, was carried out based on AICc. Nevertheless, no distinct correlations were observed between the total yield and the numbers of each PPN.
