Vol. 7, Issue 6 (2019)
Antifungal activity of oligochitosan against purple blotch pathogen (Alternaria porri (Ellis) Cif) of onion
Author(s): Gaikwad HD, SN Hasabnis, MB Kadam and SG Dalvi
Abstract: Purple blotch (Alternaria porri (Ellis) Cif) is one of the severe onion diseases in Maharashtra causing higher yield losses. Oligochitosan is obtained by gamma irradiation of chitosan and attempted to explore its effectiveness against the pathogen in vivo as well as in vitro. Present study indicated that the fungicide mancozeb @ 0.2% inhibited maximum mycelial growth and this was followed by treatment of chitosan @ 2.4%. The spore germination assay indicated that as the concentration of chitosan increased from 0.2 to 2.4%, the inhibition of spore germination was increased from 51.69 to 79.18%. The disease intensity was minimum (7.81 PDI) on the treatment chitosan @ 0.4% sprayed 30, 45, 60 DAT as compared to untreated control treatment (water spray) as 37.25 PDI. The oligochitosan is a safe natural polymer to reduce the losses caused by fungal infection and it will be helpful in hazardous chemical free disease management option.
Pages: 2425-2429 | 216 Views 69 Downloads
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How to cite this article:
Gaikwad HD, SN Hasabnis, MB Kadam, SG Dalvi. Antifungal activity of oligochitosan against purple blotch pathogen (Alternaria porri (Ellis) Cif) of onion. Int J Chem Stud 2019;7(6):2425-2429.
