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Rose scab

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Question: Rose scab

Hi I would like to know what I can use to fight the black spots that are made on the leaves of roses but more than anything else I would like to use household products instead of buying medicines what can I use that I have inside the house to treat roses?

thank you


Rose scab: Answer: Rose scab

Dear Fabrizio,

Thank you for contacting us regarding questions about your roses.

One of the most frequent problems on roses is the proliferation of fungal diseases, more commonly called "molds" due to the appearance of their fruiting which generally cover the attacked plant.

These pathogens, if not fought in time, can quickly destroy all flowers and plants.

Their diffusion is favored by humid or rainy climatic situations, and they mostly affect Roses with nutritional deficiencies.

In its specific case, the presence of "black spots on the leaves" is the manifestation of scab. It is a disease caused by the fungus Diplocarpon Rosae which creates blackish or purple confluent spots on the leaves. The affected leaves dry up and fall quickly, stripping the whole plant in a short time.

To solve this type of problem, treatments with Mancozeb or copper sulphate products must be done, the diseased branches must be eliminated, the leaves should not be wet during irrigation and an environment with less stagnant humidity should be created. In some cases, interesting results have been obtained by making treatments with sodium bicarbonate solutions.

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