Nature of postharvest disease resistance in taro (Colocasia esculenta (L.) Schott)
1997
Del Rosario, C.S. | Palomar, M.K. | Molato, A.P. (Visayas State Coll. of Agriculture, Baybay, Leyte (Philippines). Dept. of Plant Pathology)
The effects of different factors on the reaction of taro corms to infection by Botryodiplodia theobromae (Pat.), Fusarium solani (Mart.) Sacc. amd Sclerotium rolfsii (Sacc.) were investigated. Resistance or susceptibility of taro corms to the three pathogens was not significantly affected by dry matter and total sugar contents of taro corms. The same fungal pathogens did not infect at 3-11 deg C in resistant taro (VG-1 variety) stored for 3 weeks. Higher levels of antifungal compounds were present in infected resistant corms inhibited the mycelial growth of B. theobromae, F. solani, and S. rolfsii. Furthermore, in resistant VG-1 taro, injury was a prerequisite to the establishment of infection, severity of rot disease was largely affected by the degree and kind of injury inflicted on the corm. In susceptible VG-2 taro, rotting was severe both in uninjured and injured corms
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