In 1959, then property of Edouard Gasqueton, Couhins castle - confined in Gascon - is promoted Cru Classé de Graves for its white wines. Ten years later, his new life begins when INRA, the National Institute of Agronomic Research, buys it and saves it from extinction, to conduct experiments on the vine as well as on wine. Château Couhins has since become a reference in terms of environmental protection and reasoned fight. To give just one example, it was here that the method of sexual confusion, a pest control technique, was developed by disrupting their reproductive hormonal system in a biological way. is in integrated production, a global approach to produce grapes as healthy as possible. Since 2010, the castle has also embarked on a collective process of Environmental Management System - SME - to integrate the concept of environmental protection in the slightest gestures and aspect of the life of the estate, which allowed it to ISO 14001 certification. At the same time, the wines have regained their former glory and are a delight for connoisseurs.