«The Grangeneuve organic winery in the Dordogne is managed by the department's Chamber of Agriculture as part of the Dephy network.
In 2018, winemaker and owner Anthony Castaing planted the first resistant grape varieties: Muscaris and Souvignier gris.
In the last two vintages, 2022 and 2023, two copper and sulphur-based treatments were carried out on these vineyards. His overall indicator for the frequency of plant protection treatments is 1.56. "This is a great advance in plant protection and a reduction in workload, even in years with strong downy mildew pressure like 2023," he notes.
On the other hand, "it is no longer possible to go on holiday in the last two weeks of August". In 2022, for example, the Souvignier Gris was harvested on August 24, well ahead of the Sauvignon gris, the reference grape variety in the monitoring carried out by the CA24.
This "marked advancement of the phenological stages begins as soon as bud break occurs," says consultant Camille Delamotte during a webinar on the subject. In 2022 and 2023, Muscaris and Souvignier gris were in the "green point" or "leaf break" stage at the end of March. In 2022, the vines were affected by a spring frost on April 1. "This risk must be taken into account. These varieties are recommended for terroirs with little or no frost."
>>> Read also: First feedback on the resistant variety Souvignier gris»
Source: www.tema-agriculture-terroirs.fr
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