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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2019: 96.39
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2020.9(10): 3859-3869
DOI: https://doi.org/10.20546/ijcmas.2020.910.444


Occurrence and Distribution of Coconut Diseases in Tamil Nadu, India
E. Rajeswari1*, R. Ramjegathesh2, V. Sivakumar1, S. Praneetha1,
L. Pugalendhiand H. P. Maheswarappa4
1Coconut Research Station, Tamil Nadu Agricultural University, Aliyarnagar, India 2Rice Research Station, Tamil Nadu Agricultural University, Ambasamuthiram, India 3Horticultural College and Research Institute, Tamil Nadu Agricultural University, Coimbatore, India 4ICAR, Central Plantation Crops Research Institute, Kasaragod, Kerala, India
*Corresponding author
Abstract:

Coconut is an important plantation crop with many decades of life span ,suffers from numerous diseases incited by fungi ,bacteria, virus, viriod and phytoplasma leads to drastic reduction in yield. Roving survey was conducted in five major coconut growing districts of Tamil Nadu viz., Coimbatore, Tirupur, Theni, Tirunelveli and Kanyakumari districts during 2014- 2019 for assessing the incidence of important diseases of coconut .The fungal diseases viz., bud rot, basal stem rot, stem bleeding, leaf blight and leaf spot and phytoplasma disease viz., root (wilt) are the widely prevalent disease in these districts. The highest bud rot incidence of 7. 7% was observed in Pongalliyoor village in Coimbatore district and basal stem rot incidence (35.29%) in Manupatti village, Tirupur district . The prevalence of stem bleeding was found to be sporadic and the high incidence of 12.0 % was observed in Therichanamkoppu village, Kanyakumari district. The highest mean district incidence of bud rot, basal stem rot and stem bleeding was registered in Tirupur district which were 1.40 %, 2.59% and 4.94 % respectively. The severity of leaf blight was more (32.0 PDI) in Thanthoni, village, Tirupur district and the leaf spot (25. 5 PDI) in Kaliapuram village, Coimbatore district and the district mean incidence of leaf blight was highest (20.19 PDI) in Tirupur district and leaf spot (10.1 PDI) in Theni district. The maximum incidence (37.25%) of root (wilt) was noted in Gudalore village, Theni district and the district wise average was high (21.1%) in Theni district. The state average of the surveyed district for bud rot, basal stem rot , stem bleeding, leaf blight, leaf spot and root (wilt) incidence ranged from 0.09- 0.60%, 0.44- 1.03 % , 0. 1 - 1.05% 4.9 - 8.52 PDI, 2.55 to 6.55 PDI and 5.6- 10.3% respectively.


Keywords: Coconut, Bud rot, Basal stem rot, Leaf blight, Root (wilt), Survey
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How to cite this article:

Rajeswari, E., R. Ramjegathesh, V. Sivakumar, S. Praneetha, L. Pugalendhi and Maheswarappa, H. P. 2020. Occurrence and Distribution of Coconut Diseases in Tamil Nadu, India.Int.J.Curr.Microbiol.App.Sci. 9(10): 3859-3869. doi: https://doi.org/10.20546/ijcmas.2020.910.444