Fig. 5From: Molecular characterization of internal transcribed spacer (ITS) of ribosomal RNA gene, haplotypes and pathogenicity of potato rot nematode Ditylenchus destructor in ChinaExternal and internal symptoms in potato tuber caused by Ditylenchus destructor. a, b Healthy potato tubers. c, d Potato tubers lightly infected by nematodes, with light-brown and partially rotten interior tissues. e, f Severely infected potato tubers, with dark-brown and spongy interior tissues. Arrows indicate the typical external and internal symptoms in infected potato tubersBack to article page