International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 4
First page : (1539) Last page : (1547)
Article doi: http://dx.doi.org/10.18782/2320-7051.5578
Report of Anthracnose Disease of Dumb Cane [Dieffenbachia daguensis Engl.] Caused by Colletotrichum sp. from West Bengal
Mounika Katakam*, Birendranath Panja and Jayanta Saha
Department of Plant Pathology, Faculty of Agriculture, B.C.K.V., Mohanpur-Nadia, West Bengal, India
*Corresponding Author E-mail: mounikakatakam@gmail.com
Received: 12.07.2017 | Revised: 24.07.2017 | Accepted: 27.07.2017
ABSTRACT
Dumb cane [Dieffenbachia daguensis Engl.] is an economically important house plant grown in the garden of Agri-Horticultural Society of India at Kolkata, West Bengal .At the study location, anthracnose disease caused devastating damage of the foliage. Symptoms appeared as large lesions with dark brown smooth to wavy margin and grey centres with fruiting bodies arranged in concentric manner over it. Acervuli produced were black, erumpent, 247.9 – 410.8 µ in size with black, 2 - 3 septate, 97. 0 – 169.5 x 3.0 – 5.0 µ sized setae. Conidia were hyaline, single celled, numerous, cylindrical with both ends rounded, 20.8 – 28.2 x 4.4 – 7.1µ in size. Acervuli productions were huge in the Peptone Salt Agar medium which was used as sporulation media in comparison to other media. On the medium, acervuli were 472.6 – 657.9 x 298.8 – 420.8 µ sized, light brown to black with 154.9 – 230.5 x 4.7 – 6.9 µ sized ,few to numerous, dark brown to black, 2 - 3 septate, unbranched, tapering /pointed tipped setae. Conidia were hyaline, single celled, smooth walled, eguttulate, short cylindrical to rod shaped, sometimes constriction was observed at the centre of conidia, measuring 19.9 – 25.6 x 4.2 – 6.2µ in size. At the time of conidial germination, the central region of the length of conidia became narrowed, formed dumble-shaped, one septate, ends tapered and germinated bipolarly. Pathogenicity test of the isolated fungus had been established under laboratory condition following detached leaf technique. On comparison of the isolated fungus with C. gloeosprioides and Colletotrichum capsici which were known to attack the host, it was found that acervuli and conidial characteristics of causal fungal pathogen of the present study differed from Colletotrichum gloeosporiodes due to the greater dimension and also from Colletotrichum capsici due to dissimilarity in spore shape and size. So, the causal fungus of presently described anthracnose disease of Dieffenbachia daguensis is being proposed as Colletotrichum sp. from West Bengal.
Key words: anthracnose, Colletotrichum, Dumb cane, Dieffenbachia sp.
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Katakam, M., Panja, B. and Saha, J., Report of Anthracnose Disease of Dumb Cane [Dieffenbachia daguensis Engl.] Caused by Colletotrichum sp. from West Bengal, Int. J. Pure App. Biosci.5(4): 1539-1547 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5578
