Elucidation of blackening disease in lotus (Nelumbo nucifera Gaertn.) caused by Hirschmanniella diversa Sher

The lotus (Nelumbo nucifera Gaertn.) is widely cultivated in Asia, but kurokawa-senchu-byo of blackening lotus tuber is serious problem, which is caused by Hirschmanniella diversa Sher of plant-parasitic nematodes. To effectively control the disease, we must elucidate the blackening mechanisms; therefore, we performed soil chemical analysis and evaluation of the disease level in the lotus cultivation fields, identification of chemical components of black spots on the lotus surface, and microbiome analysis of the black spots.

莲（Nelumbo nucifera Gaertn.）在亚洲地区广泛栽培，但其莲藕块茎变黑病害（kurokawa-senchu-byo）是一类严重的病害问题，该病害由植物寄生线虫多样潜根线虫（Hirschmanniella diversa Sher）引发。为有效防控该病害，亟需阐明其致病机制；为此，本研究对莲藕种植田开展了土壤化学分析与病害级别评估，对莲藕表面黑斑的化学成分进行了鉴定，并针对黑斑开展了微生物组分析。