Efficacy of fungicides to control of post-harvest anthracnose (Colletotrichum gloeosporioides) and stem-end rot (Lasiodiplodia theobromae) of mango.
Mortuza M. G., Islam M. S., Alam S. M. K.
Author Affiliation: Plant Pathology Division, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh.
Bangladesh Journal of Plant Pathology 19 : 87-92
Abstract : A field trial was conducted to evaluate the effectiveness of pre- and postharvest application of 8 fungicides to control postharvest anthracnose (Colletotrichum gloeosporioides [Glomerella cingulata]) and stem-end rot (Lasiodiplodia theobromae) of mango from February to July 2002 in Nawabganj, Bangladesh. Preharvest application of Penncozeb (mancozeb, 3 g/l) completely prevented postharvest anthracnose development up to 15 days after harvest. Preharvest spray with Acrobat MZ (dimethomorph + mancozeb, 2 g/l) and Bavistin (carbendazim, 1 g/l) successfully controlled stem-end rot of harvested mango fruits. All fungicidal treatments under investigation significantly reduced fruit blackening and red rust on leaves when applied before harvesting the fruits. At ambient temperature, dipping fruits in fungicides suspension was less effective in reducing incidence and severity of anthracnose. Dipping in suspension of Acrobat and Bavistin completely controlled stem-end rot development on mango fruits. Dipping in warm suspension (55?C) of fungicide for 5 min was more effective in controlling both the diseases than dipping at ambient temperature. Dipping fruits in warm suspension of Tilt (propiconazole, 0.5 ml/l) completely controlled latent infection of anthracnose and similar treatment with Penncozeb and Bavistin prevented development of stem-end rot.