March 17, 2026 - 0 comments
Les Maisons Rouges: clay against drosophila
Globalisation and climate change are taking their toll. Since 2013–2014, an insect originating from Japan has made life more difficult for winemakers working with thin-skinned grape varieties: Drosophila suzukii.
Unlike the European drosophila, which patiently waits for fruit to rot, this species can pierce the skin of perfectly healthy grapes. It punctures the berry, lays its eggs and at the same time injects acetic bacteria that generate volatile acidity. A serious threat, particularly for Pinot Noir in Burgundy and for fragile grape varieties in the Loire.
At Les Maisons Rouges, the dilemma is clear. Harvesting too early sacrifices ripeness. Waiting too long exposes the grapes to insect damage. Warm years only intensify the problem.
Using insecticides is not an option. The estate refuses all synthetic products and relies instead on the natural balance between fauna and flora. When the predators of pests are present, regulation happens on its own.
The chosen solution is mechanical. White calcined clay is sprayed onto the grape clusters during the final three weeks before harvest. This fine, neutral layer alters the appearance of the berries. Attracted to red, glossy fruit, the drosophila no longer recognises them.
The result is clear. Minimal punctures, controlled volatile acidity, and naturally preserved balance. Simple, effective, and respectful of life.
