Control of Botryodiplodia theobromae a causal organism of stem end rot disease of mango fruits using essential oils and plant extracts
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Authors
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Pramila Tripathi
Department of Botany, D.A.V. P G College, Kanpur 208 001, Uttar Pradesh, India.
Keywords:
Postharvest diseases, mango, essential oil, stem end rot disease, plant extracts, Botryodiplodia theobromae.Abstract
Phytopathogenic fungi Botryodiplodia theobromae causes stem end rot disease in mango fruits. Twenty angiospermic taxa were evaluated for their antifungal activity against this fungi. Among the selected plants, essential oil of Adenocalymma alliaceum was found effective in controlling the growth of Botryodiplodia theobromae. The minimum inhibitory concentration (MIC) of the essential oil was found to be 100ppm. The oil was found to withstand high inoculums density. Plant extracts were prepared in water, acetone, ethyl alcohol, petroleum ether, ethyl acetate and methanol. Plant extracts of Allamanda cathartica, Lawsonia inermis, Prunus persica and Adenocalymma alliaceum showed inhibitory effect on the B. theobromae. However, Leaf extract of Adenocalymma alliaceum in all the solvent namely, water, acetone, ethyl alcohol, petroleum ether, ethyl acetate and methanol was found to have antifungal activity.
The extract and oil of A. alliaceum was also found effective against other fruit rotting fungi too. An enhancement in the shelf life of mango fruits was recorded under in vivo trial after treating with aqueous extract and essential oil of A. alliaceum.
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