et al., 1941). Young tissues of all parts of the inflorescence, leaves and attacked by the fungus. Initial infection with O. mangiferae is promoted by warm temperatures and moderate relative humidity, although development of the disease is favoured by cool, dry conditions. They can also show deformation, e.g. Grow mango trees on dry and well-ventilated areas. Losses of 80-90% … Treating the plants with foliar sprays based on sulfur, carbonic acid, neem oil, koanin and ascorbic acid can prevent severe infection. The following fungicides are recommended for use in prevention and eradication of powdery mildew disease of mango; The following practices help in reducing the fungus inoculum, prevent the spread of the disease and provide a condition that does not favour the development of the disease. Continuous applications at regular intervals of 7-14 days are recommended. It is caused by the fungus Oidium mangiferae and causes extremely high reductions in yield. Affected flowers do not open and in most cases, they shed prematurely. Furthermore, milk is a natural fungicide. Fungal growth was usually severe on panicles, then plants became brown and defoliated. The following methods are employed in the control and/or management of powdery mildew of mango; This is the best and more effective management strategy for controlling the disease. Greenlife Crop Protection Africa. Crop losses up to 100 percent have been reported in oasis of blossom infection when disease spreads in epidemic form. The fungus attacks inflorescences, leaves, and young fruits. In the worst cases, the … Let us know if you liked the post. After landing on the plant tissue, a conidium of O. mangiferae germinates, enters a stoma/pore and then grows. Worldwide, mango powdery mildew is a sporadic but very severe disease of mango leaves, panicles, and young fruits; up to 90 percent crop loss can occur due to its effect on fruit set and development. Powdery mildew is a very serious disease of mango, affecting almost all cultivars in all mango-growing regions of the world. Poor fruit set and heavy flower and fruit drop result in severe yield losses, sometimes reaching as high as 70–90% on an individual plant. Young tissue of all tree elements except for the stem and the roots are highly susceptible to the fungus. Regular pruning of infected inflorescences at an early stage. Do not mistake with the waxy light-green whitish patches along inner veins of mango leaves that are natural. It usually takes about 7-10days from the time of infection to development of symptoms. Fungicides containing monopotassium salts, hydrodesulfurized kerosene, aliphatic petroleum solvent, mancozeb and myclobutanil can be used to treat powdery mildew on mangos. Choose more tolerant or resistant varieties if available. Oftenly inflorescences become completely covered by the mildew and eventually blacken or become brown and dry. curling downwards. Prune plants and remove tall weeds to reduce the incidence of the fungus. It can be applied in the form of whey to control powdery mildew. Oidium mangiferae attacks the young tissue of all parts of the inflorescence, leaves and fruits. Flowers and stalks can become severely infected and sepals are more susceptible than petals. and it is a serious threat to mango production its severity mainly depends on climatic conditions. The infected parts of the mango trees become covered with a whitish and powdery mold. In China the disease reduces yields by 20-30% (Li GuiZhen et al., 2003). Cook 2012 (formerly known as Oidium mangiferae Berthet), is one of the most common, widespread and serious diseases throughout the world and causes significant yield losses. For optimal effect, the treatment should start before flowering or at very early flowering stages. The disease is spread by wind-borne conidia from other mango trees or from within an infected tree’s canopy. Continuous applications at regular intervals of 7-14 days are recommended. During and after flowering, infected panicles, leaves, and young fruits became coated with a whitish powdery fungus. The fungus attacks inflorescences, leaves, and young fruits. Alternating different fungicides throughout a plant’s season prevents the fungus from developing resistance over any of the fungicides. Powdery mildew is one of the devastating foliar diseases of mango affecting almost all the cultivars. Inflorescences; flowers are most susceptible to infection once they have begun to open on the panicles, about 3-5 weeks after bud break. A leading agrochemicals, seeds and farm equipment’s company in Africa. Learn more. The entire fruit may become covered by the mildew and may become yellow and misshapen. On older leaves and fruits, infected tissue has a purplish-brown cast as the white growth weathers away. Powdery mildew disease was found on mango (Mangifera indica) in Okinawa Prefecture, Japan, in April 2013. It’s a fungal infestation that attacks the mango trees, flowers as well as the young fruit. Worldwide, mango powdery mildew is a sporadic but very severe disease of mango leaves, panicles, and WordPress Download Manager - Best Download Management Plugin. Mango powdery mildew is an easily recognizable problem; the symptoms are very apparent and are diag … Infection shows initially as small patches of white powdery mycelium, which may later coalesce to cover large areas. This site uses cookies to offer you a better browsing experience. A proper nutrition builds/boosts the plants’ immunity against infections. Powdery mildew is a serious disease of mango in the world caused by a fungus Oidium mangiferee. Copyright 2020. Pay attention to the risk indications and follow the safety precautions on the label. The pathogen survives between seasons on old leaves or in dormant buds. 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