LIFE HISTORY AND PATHOGENICITY OF RENIFORM NEMATODE ON COTTON VAR. MCU 5

C. MATHIVATHANI¹, K. POORNIMA²*, P. KALAIARASAN³, M. MUTHAMILAN⁴, P. JEYAKUMAR^5
1Department of Nematology, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
²Department of Nematology, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
³Department of Nematology, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
⁴Professsor and Head, Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
⁵Professsor and Head, Department of Crop physiology, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
* Corresponding Author : poornimamurtysista@gmail.com

Received : 01-04-2019     Accepted : 12-04-2019     Published : 15-04-2019
Volume : 11     Issue : 7       Pages : 8204 - 8208
Int J Agr Sci 11.7 (2019):8204-8208

Keywords : Reniform nematode, Biology, Pathogenicity, Cotton
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Department of Nematology, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
Author Contribution : All authors equally contributed

The life cycle of reniform nematode, Rotylenchulus reniformis was completed in 17-23 days from egg to egg stage in cotton (MCU 5). Pre and post infection life cycle were completed in 7 days and 12 days respectively. Immature females-initiated infection by protruding the anterior portion of the body through epidermis and feed the phloem tissue of younger roots. Eggs were laid on root surface in gelatinous matrix. The maximum numbers of eggs per egg mass observed were 83- 90. A pot experiment for studying the pathogenicity of R. reniformis showed negative correlation between inoculum level and plant growth but the nematode inoculum level and nematode reproduction showed positive correlation.

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