The end of this line on the wiki leads to this link
https://www.leparisien.fr/archives/jard ... 588113.php which does not really dispute the conclusions of the scientific council
At the distributors of these products, we are procrastinating. “The effectiveness is far from zero, but people must understand that it has nothing to do with that of conventional phytosanitary products. Their interest is that they provide nitrogen, so that they act as stimulants and strengthen the vigor of the plant. We prefer to use the term vitality cure, ”explains Marion Vitupier, marketing manager at Scotts, which markets the Naturen or KB brands. But she acknowledges that "the problem is the lack of a reliable database."
This is exactly the results of the study
Same story at Botanic. "Industrialists do not want to invest in research because the market is not sufficient", recognizes Jean-Michel Pougnet, gardening advisor for the brand. “We have always relied on the testimonials we receive in our stores from home gardeners. They see results every day. They are the ones who make up our database. This gives us a more credible panel than this study, ”he adds.
The debate is far from over. And in 2019, for lack of being able to obtain pesticides, we will have to find effective remedies to protect gardens in a natural way.
In other words: the customer is king and he is quite right to think what he thinks ... Anyway as there will not be many synthetic molecules left to sell, the main thing is to sell
Thus, added to Bordeaux mixture to treat the vine, they would reduce the amount of copper. whose impact on the ground is not insignificant. The combination of several liquid manure would give interesting results. This is what Jean Lemoussus, owner of the Marqueyssac gardens in Dordogne (photo), whose boxwood is sick, notes. “Before, I used a chemical solution but with mixed results. In 2013, after a massive attack, I decided to try a mixture of nettle manure, horsetail and comfrey in high doses. Today, the disease is still there, but it seems contained. I haven't had a major new stroke. It's a personal observation, but I don't know why or how it works… ”he testifies.
Just like the farmer quoted here
https://www.cultivar.fr/technique/les-m ... s-cultures It gives positive results in particular conditions without giving the details of its tests ...
Who says the results will be so favorable with different weather? and who says that it would not be the small supply of nitrogen that would have been decisive, since it is organic? The question remains open