RACES OF RICE ROOT KNOT NEMATODE, Meloidogyne graminicola INFECTING RICE IN TAMIL NADU

M. SHANMUGA PRIYA¹*, J. JAYAKUMAR², A. SHARMILA³, K. JANCY RANI^4
1Dr M.S.S Agricultural College and Research Institute, Thanjavur, 614 902, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
²Krishi Vigyan Kendra, Vridhachalam, 606 001, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
³Department of Nematology, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
⁴Adhiyamaan College of Agriculture and Research, Krishnagiri, 635105, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
* Corresponding Author : shanmugapriyam@tnau.ac.in

Received : 19-10-2023     Accepted : 28-11-2023     Published : 30-11-2023
Volume : 15     Issue : 11       Pages : 12761 - 12762
Int J Agr Sci 15.11 (2023):12761-12762

Keywords : Rice, Root Knot Nematode, Meloidogyne graminicola, Race, Host Differential Test
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Dr M.S.S Agricultural College and Research Institute, Thanjavur, 614 902; Krishi Vigyan Kendra, Vridhachalam, 606 001; Adhiyamaan College of Agriculture and Research, Krishnagiri, 635105, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
Author Contribution : All authors equally contributed

The rice root-knot nematode, Meloidogyne graminicola belongs to the family Heteroderidae is one of the most economically important nematode affecting rice. It has been reported to cause significant yield loss of 20-50 per cent. The root knot nematode, M. graminicola infecting rice in Tamil Nadu was identified as race ‘b’ by North Carolina host differential test. The results of North Carolina host differential test showed that M. graminicola reproduced on both rice and wheat. However, when compared to wheat, rice had the highest rate of reproduction. In comparison to wheat (409.92), the number of second stage juveniles (J?) per gram of root in rice was recorded as 992.69. Similarly, number of galls on rice roots were significantly higher (72.69) compared to wheat (37.62) and size of galls were bigger in case of rice compared to wheat

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