Our garden, if not well cared for, can be prey to parasites and subject to diseases; among the creators that cause diseases we find fungi, which in fact attack the green causing unsightly spots on the leaves visible to the naked eye.
Among the most common plant diseases we find "white sickness" and "gray mold". But let's see in detail how to recognize plant diseases iin order to defeat them promptly.
Plant diseases, badly white
Powdery mildew, more commonly known as "white mal" manifests itself with a whitish and floury patina that forms the typical "dust" on the leaf. It is a fungus that spreads mainly in a humid climate and with a temperature that is around 20-25 degrees: it can infect both the leaves and the flowers, causing them to fall rapidly and cause the death of the plant in extreme cases. .
What to do to defeat the white sickness?
It is necessary to intervene in a timely manner without underestimating the problem as soon as the typical spots on the leaves are found as previously described: the intervention consists in preparing a decoction of horsetail to be spread on the leaves of the plant. If the disease is serious enough, that is, having already infected a large number of leaves, it will be necessary to intervene with antifungal products based on sulfur.
Plant diseases, gray mold
Another widespread plant disease is botrytis, known as gray mold. This fungus manifests itself with a whitish-gray hair and a softening of the parts that support the flowers and leaves. A quick wilting of the plant usually follows. It generally attacks the weakest plants, preferably herbaceous such as cyclamen, petunias, violets, but also fat ones.
What to do to defeat gray mold?
First you must try to intervene by eliminating the causes of the spread of the fungus, that is the high humidity, therefore it will be good to frequently ventilate the greenhouse, if your plants are there.
If you want to resort to more drastic methods, you can intervene by removing the plants that have spots on the leaves from the others and cut the parts affected by the fungus. You will then have to prepare a copper and propolis-based compound to spray on the plants, repeating the operation after a week.