Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2024, Vol. 40 ›› Issue (12): 126-133.doi: 10.11924/j.issn.1000-6850.casb2023-0444

Special Issue: 植物保护 水稻

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Survey and Pathgen Identification of Rice Root Knot Nematode Disease in Rice-Vegetable Rotation Fields in Guangxi

HUANG Jinling1(), QIN Liping1, LIU Zhiming1, LIU Zhengrong2, LI Hongfang1, LU Xiuhong1()   

  1. 1 Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences/Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China, Ministry of Agriculture and Rural Affairs/Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning 530007
    2 College of Agriculture, Guangxi University, Nanning 530005
  • Received:2023-06-12 Revised:2023-09-04 Online:2024-04-25 Published:2024-04-22

Abstract:

In order to investigate the occurrence of root knot nematode disease in rice-vegetable rotation fields of Guangxi, and clarify the pathogen species, a sampling survey on the occurrence of rice root-knot nematode disease was carried out in 171 rice-vegetable rotation fields in 27 townships of 14 cities in Guangxi. Nematodes were isolated from samples, and the species was identified by observing the morphological characteristics of second instar larvae and perineal pattern of females, and analyzing ribosomal ITS region and 28S rDNA D2D3 region sequences. The results showed that 64 fields of them were affected with root-knot nematodes, with a detection rate of 37.4% during the rice-growing season and 25.7% during the vegetable rotation. The species of root- knot nematode on rice in Guangxi was confirmed as Meloidogyne graminicola. It indicated that the disease caused by M. graminicola had occurred widely in rice-vegetable rotation fields in Guangxi, and more attention should be paid.

Key words: Guangxi, rice-vegetable rotation, rice root knot nematode, investigation, identification