Powdery mildew is one of the most common diseases of apples. It is easily recognizable and develops from a fungus, Podosphaera leucotricha. The disease affects apple-producing regions all over the globe. Trees infected with the disease show damaged fruit and flowers buds. Home gardeners with apple trees can fight and prevent the disease in a variety of ways.
SYMPTOMS
Powdery mildew appears as a thin layer of white or light gray coating containing circular spores and mycelium, threadlike fungal structures. The powder appears on both sides of leaves and tree shoots. The disease distorts leaves and they fall prematurely. Infected fruit develops splotches that look like rust. Fungal spores travel via wind, splashing water or insects. The fungus feeds on the epidermal cells of plants and overwinters in leaves or fruit buds. During the spring when the infected buds open, the fungus begins to grow again on fruit and foliage.
CULTURAL CONTROL
If infected, white-appearing shoots are noticed early in the season, during early spring, gardeners should prune them. Disinfecting your shears after pruning and destroying all infected plant parts helps prevent spreading the disease to other plants. Cultural conditions can also enhance the chance of powdery mildew; dampness, poor circulation, excessive shade and high humidity all lead to higher infection rates. Planting trees in sunny areas and avoiding excessive use of fertilizer helps avoid infection. Young trees are least resistant to the disease.
Home gardeners can choose from several low-toxicity fungicides to help control powdery mildew. These include spray solutions of horticultural oils such as neem oil, jojoba oil and brand name spray oils meant for fruit trees. Sulfur fungicides are preventative solutions, primarily used before the symptoms of the disease appear. Applying sulfur within two weeks of a fungicide can harm the plant. Sulfur is also harmful when temperatures reach above 90 degrees Fahrenheit. Other commercial spray fungicides containing other chemicals are available to home gardeners. Only fungicides specifically labeled for fruit trees are appropriate for use on apple trees.
A variety of natural and chemical fungicides can help prevent secondary infections of powdery mildew but only when applied early in the season. Applications begin during the pre-pink stage, before blossoms start showing a pinkish color and are repeated every two to three weeks. Sticking with a fungicide application schedule reduces overwintering and the need for future fungicide applications. Using nitrogen fertilizer during the late summer is avoided, as the disease easily infects succulent plant tissue. Home gardeners should not use any fungicide until the disease is identified to avoid harming the tree and nearby plants.
REMEDIES
FOR
POWDERY MILDEW
It is difficult to fight powdery mildew.
But it is not impossible.
To prevent plants from powdery mildew, controlling and getting ridpowdery mildew. You can prepare own special organic liquid mixture forpowdery mildew yourself, both economically and so effective.
To prepare this special organic liquid mixture, You need some ingredients that you can find your country easily, formulation and production process. You need no help and no technıcal support to make this mixture. simple mixing is sufficient.
Below textbook has a formulation and manufacturing process of special organic liquid mixture and methods of application to treat powdery mildew. You can produce special organic liquid mixture for powdery mildew easily and apply to plants safety.
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