The exceptional climatic conditions this year caused a rapid spread of late blight over a large part of the French vineyard, on potato crops in the North of France as well as on field tomato crops.

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Nevertheless, the specifications of organic farming prohibit any synthetic product, and copper-based solutions are today the one and only treatment product against mildew. We can therefore understand the motivations of the ministry of rue de Varenne, anxious to preserve a sector grappling with such difficulties.

This explains why, in its Esteban study, conducted between April 2014 and March 2016 on a sample of 1104 children and 2503 adults, aged 6 to 74 years, Public Health France (SpF) notes that “more copper is found in consumers of foods from organic farming, especially children.

“Urinary copper concentrations are increased by 8% in those who consume organic vegetables more than 4 times per week compared to those who never or rarely consume them,” reports SpF.

However, for a long time, the toxicity of copper-based solutions, such as Bordeaux mixture, was the subject of a taboo, the organic lobby having managed to eclipse any debate on this subject.

[Editor’s note: This article was originally published in French and has been translated and edited for clarity.]

This is an excerpt. Read the original article here.

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