France's Constitutional Council has invalidated the most contested provision of the recently passed Loi Duplomb, which sought to reintroduce the banned neonicotinoid pesticide acetamiprid under certain conditions. The court ruled this provision contrary to the French Environmental Charter, effectively prohibiting the pesticide's use despite its authorization in the European Union until 2033. The decision sparked a divided response: environmentalists and left-wing groups hailed it as a victory for health and environmental protection, while agricultural unions such as the FNSEA and many farmers criticized it as detrimental to French agriculture, warning of risks to certain farming sectors including sugar beet and hazelnut producers. Laurent Duplomb, the law's author and a senator from the center-right Les Républicains party, expressed regret over the ruling and did not rule out proposing a new legislative text to reintroduce acetamiprid. The French government, including Agriculture Minister Marc Fesneau, acknowledged concerns about the potential disappearance of some agricultural sectors due to the ban. Prime Minister Élisabeth Borne noted the absence of a medical or scientific study justifying the pesticide's reintroduction during parliamentary debates. Despite the partial censorship, President Emmanuel Macron promulgated the Loi Duplomb without the contested pesticide provision. The controversy continues to fuel debate among politicians, farmers, environmentalists, and scientists, with calls for further evaluation of acetamiprid's health impact at the European level. The decision also raised concerns about unfair competition for French farmers compared to other EU countries where the pesticide remains authorized.