The severe occurrence of rice rootknot disease on a large scale was found in Zhenghe, Fujian Province， China. Severe rootknot nematode infestation was also found on grass Eccoilopus sp. of Gramineae in drainage ditch adjacent to rice fields. Morphological characteristics and measurements of root knot nematode on rice or on Eccoilopus sp. were consistent with the original description of Meloidogyne graminicola. The regions of rDNAITS and 28S rDNAD2/D3 of the root knot nematodes were amplified, cloned and sequenced. The sequence each of region had a high degree of genetic similarity (>99%) to the relevant regional sequences of M. graminicola in GenBank. The results showed that the species of rootknot nematodes on rice or Eccoilopus sp. was M. graminicola.The results of habitat investigation and inoculation experiments showed that Eccoilopus sp. was an important host of M. graminicola， and served as an important source of infection of rice rootknot nematode disease in fields.
LIU Guo-Kun, WANG Yu, XIAO Shun, ZHANG Shao-Sheng*
. Pathogen Identification and Infection Sources of Rice RootKnot Disease [J]. Chinese Journal OF Rice Science, 2011
, 25(4)
: 420
-426
.
DOI: 10.3969/j.issn.1001-7216.2011.04.012
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