izentrop wrote:humus wrote:there are grape varieties resistant to downy mildew
does not mean exempt
These naturally resistant vines are pleasure varieties, only reserved for amateur gardeners. They are often obtained by crossing and then selecting different species, generating hybrids with more interesting properties than their parents.
It is still very important to understand that buying a vine that is naturally resistant to mildew and powdery mildew will not allow you to completely avoid treatment. Indeed, two to three sprayings of Bordeaux mixture in the spring will still be necessary to prevent the appearance of parasites, especially in the wet spring period.
https://www.jardipartage.fr/vignes-natu ... sistantes/
And the naturally resistant American grape varieties?
Ah yes, their wine makes you blind, the forbidden grape varieties... yes, already at the time, propaganda and lobbies...
For information before 1850, the vine was 100% organic in France. We treat only because of the introduction of diseases introduced from America.
And that does not remove that the treatments in Bio are limited to the vine, so all the other productions are virtuous, contrary to what you are trying to insinuate. That's a bit dishonest, like a lobbyist would