GREEN GRAM DRY ROOT ROT [Macrophomina phaseolina (Tassi) Goid.] AND ITS MANAGEMENT 35
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Date
2022-09
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JAU,JUNAGADH
Abstract
Green gram [Vigna radiata (L.) Wilczek] is one of the important pulse crop of
India and also known as mungbean. It belongs to the family Fabaceae and it is an
excellent source of high-quality protein. Dry root rot disease caused by the soil and
seed borne fungus M. phaseolina is a major limiting factor in the green gram
production. Dry root rot also known as charcoal rot. It is economically more
important in the tropical and sub-tropical areas of the world having arid climate. The causative organism isolated from the infected root of green gram plant
was cultured and the isolated pathogen was identified as M. phaseolina (Tassi) Goid. based on cultural and morphological characters, young mycelium was white in colour
and it turned into dark at maturity. The fungus produced sclerotia, pycnidia and
pycnidiospores. The microscopic observation revealed that mycelium was hyaline, thin walled, light brown to dark brown in colour and having more septa with
branching of hyphae was at right angle and constrictions observed at point of
branching. The sclerotia were irregular in shape and size with measuring form 95-130
x 70-150 µm with an average of 95 to 112 µm in size. Pycnidia were ostiolate, globose, dark brown and opening by apical having multicellular wall with heavily
pigmented thick-walled cells on the outer surface of host tissue and measured 100-169
µm in diameter. Pycnidiospore were hyline, ellipsoid to ovoid in shape measurin