Copper sulphate use

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Question: use copper sulfate

Good morning,
I would like to know whether to use copper sulphate on peach trees in full vegetation
or if this practice is harmful to the plant.
Thanks

First of all its phytotoxicity is known: copper negatively influences growth and can cause necrosis and burns on parts that are not yet lignified: stems, leaves, fruits.
The most sensitive plants are the peach tree and the pear tree (on which the applications must be made only on brown, that is when the vegetation is totally missing).
However, cherry and apricot trees are also fairly sensitive. The vine and many vegetables are more tolerant. Furthermore, the distribution should always be done with time and well-dried vegetation.
- It will irreparably damage the pollen. It is therefore necessary to avoid treating during flowering, especially in the garden, in the orchard and in the vineyard.
- Contaminates aquifers and is dangerous for aquatic fauna.
- It is not biodegradable and accumulates in soils. Over time it can cause a loss of vitality (less bacteria and mycorrhizae) and therefore fertility, a situation which will be very difficult to remedy. The problem will be more evident when the substrate is more acidic.
In many cases the use of copper has proved to be practically irreplaceable. It is therefore very important to use it responsibly, limiting the doses and the number of administrations.