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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39 For more details click here
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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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Original Research Articles

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(12): 2446-2454
DOI: https://doi.org/10.20546/ijcmas.2020.912.289


Studies on Morphological Variability of the Fungal Pathogen,  Lasiodiplodia theobromae causing Dieback in Mango
Dheivam1, K. Manonmani1*, K. Kalpana1, C. Senthilraja2,Theradimani1 and J. Rajangam3
1Department of Plant Pathology, Agricultural College and Research Institute,
Tamil Nadu Agricultural University, Madurai, India
2Department of Plant Protection, 3Department of Fruit Science Horticultural College and Research Institute, Tamil Nadu Agricultural University, Periyakulam, India
*Corresponding author
Abstract:

Mango (Mangifera indica Linn.) is the “king of fruits” originated from South East Asia. Mango is affected by many biotic stresses; among them dieback is one of the serious diseases incited by the fungus Lasiodiplodia theobromae. Roving survey conducted in Tamil Nadu revealed the maximum disease incidence of 55.84% in Mulaiyur village (ILtDM10) of Dindigul district and minimum disease incidence of 8.95% in Ettipatti village (ILtDM17) of Krishnagiri district, Tamil Nadu. Major symptoms observed were defoliation of infected leaves, tip dieback, bark, twigs drying, shrivelling of twigs, vascular discolouration, and finally death of plants. Thirty numbers of pathogen isolates were collected from the diseased plant parts collected during the survey and pure cultures of them were established. The morphological characteristics of the pure cultures were studied and the pathogen growth was initially white, later on grey to dark greyish black with black to dark black pigmentation. Conidia were initially hyaline, unicellular, sub ovoid to ellipsoid and mature conidia were dark brown to black, bi-celled, ellipsoid, thick walled with longitudinal striations. The size of the conidia varied between 18.4 - 26.8 × 10.6 - 14.2 µm.


Keywords: Mango dieback, Lasiodiplodia theobromae, Morphological variability
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How to cite this article:

Dheivam, M., K. Manonmani, K. Kalpana, C. Senthilraja, M. Theradimani and Rajangam, J. 2020. Studies on Morphological Variability of the Fungal Pathogen, Lasiodiplodia theobromae causing Dieback in Mango.Int.J.Curr.Microbiol.App.Sci. 9(12): 2446-2454. doi: https://doi.org/10.20546/ijcmas.2020.912.289