Powdery mildew is bad for your health
– How to prevent: For roses, euonymus and hydrangeas apply the fungicide preventively in March-April. Repeat the treatment from September to October. There is also a systemic, curative and preventive anti powdery mildew fungicide based on penconazole.
– How to recognize it: They are a type of fungi that settle inside the tissues and produce light green or yellowish spots on leaves, stems and fruits. They then turn brown and the leaves dry up and fall off. This causes a strong weakening of the plant and a significant decrease in foliage, which in many cases leaves the fruit unprotected against the action of the sun.
– How to prevent: From spring onwards, especially if it is rainy, spray the plants, and even those around them, with a fungicide containing copper oxychloride on the leaves every 7-10 days; in the case of the orchard, until harvest.
– How to recognize it: It manifests itself in the form of ochre-colored spots on the upper side of the leaves and spores lumps on the underside. It causes the affected leaves to fall off and a general weakening of the plant.
When does powdery mildew die?
Between 25º and 28º is the optimum temperature for its development. From 35º (with the arrival of heat) its development slows down. From 40º the powdery mildew dies.
How to combat powdery mildew and downy mildew?
The only way to combat mildew is through prevention, since it becomes an uncontrollable pest, while powdery mildew can be combated with sulfur. – Copper sulfate should always be applied after a very wet night to prevent them from appearing.
How to eliminate powdery mildew with hydrogen peroxide?
To make the proper concentration of hydrogen peroxide to remove fungi or bacteria, mix 3 percent hydrogen peroxide with the same amount of water and place the mixture in a spray bottle and proceed to spray the plants.
Powdery mildew is known in La Rioja as ceniza, but it is also frequently referred to as cenicilla, blanqueta, polvo, polvillos, roya, cendrada, cendrosa, malura, etc… depending on the wine-growing area.
VIVANDO, BASF’s fungicide VIVANDO is the key to powdery mildew control in the main horticultural crops because its formulation and mode of action offer long-lasting protection. Its respect for beneficial organisms makes it an indispensable tool in any treatment program.
To adequately control powdery mildew it is essential to carry out a good phytosanitary application, wetting the vegetation conscientiously, for which it is necessary to pass through all the alleys with the equipment well regulated and calibrated.
Powdery mildew how to eliminate it
Powdery mildew is frequent on leaves of cucurbits (zucchini, cucumbers, melons and watermelons), although we often find that kind of whitish flour that dries the leaves on roses or on tender shoots of peaches or nectarines. Why does powdery mildew appear?
Powdery mildew usually appears in environments with high humidity, sprinkler irrigation, or prolonged rainfall with temperatures between 10º and 20ºC. Its propagation is favored by cuts and wounds, so try not to touch sensitive plants, such as zucchini or cucumbers, when they are wet.
An excessively shaded location, a poor choice of species (poorly adapted to the humidity of our orchard), an excessive thickness of foliage with the resulting poor ventilation, pruning and neglect of the wounds caused and combinations of high temperature and humidity can all play a role.
A lack of aeration can facilitate the colonization of powdery mildew, this can be due to too dense and tight foliage. Thinning and pruning can be a circumstantial solution, but if the problem persists, the plant should be relocated or a species better adapted to the humidity of the area should be chosen.
Fungicides for powdery mildew
To make the proper concentration of hydrogen peroxide to remove fungi or bacteria, mix 3 percent hydrogen peroxide with the same amount of water and place the mixture in a spray bottle and proceed to spray the plants. This helps to remove mold, fungi and some insects, as it causes an acceleration in the oxidation process of the molecules, similar to what happens when hydrogen peroxide is placed on a skin wound.
Now to avoid this inconvenience and that the plant dies, it should be watered with hydrogen peroxide at 3 percent diluted in 1 liter of water. Then you should wait the necessary time for the soil to absorb the water properly (that it is dry) and then water again.
It can be used as a natural fertilizer for the soil, and this is because it has 1 more atom of oxygen. This helps the roots to become much stronger and collaborates for the absorption of the different nutrients.