Mal white powdery mildew

Powdery mildew or white sore

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It is a widespread disease especially in summer and can be resolved with sodium bicarbonate-based treatments in the initial phase or later with sulfur-based products and systemic fungicides. Some sulfur-based formulations, however, become phytotoxic at very high temperatures, so you have to be careful to choose the right product; another excellent alternative is to choose a product based on its antagonist fungus Ampelomyces quisqualis. The fungi responsible for the disease are favored by a humid environment (ideal temperature between 15 and 23 ° C), and by the rains or irrigations that wet the foliage.

Recognizing the disease is quite simple, already in the photos it is clear what the main symptoms are, more or less widespread white spots, in roses they look like a white veil, in zucchini first round white spots begin to appear and then they widen to cover everything The leaf. Let's see an example of the photo above in Salvia, the leaves of this aromatic plant have a rough surface and are covered with thin hair and this particular texture makes them an optimal environment for the rooting of the fungus and the subsequent multiplication of the spores.