French rural workers are also angry over the potential hit to their livelihoods from a provisional trade deal struck by the EU and Mercosur.
France will not sign the EU-Mercosur farming deal struck between the European Union and the Mercosur countries of Brazil, Argentina, Uruguay and Paraguay under current conditions, France's environment minister said on Tuesday.
"We can't sign a trade treaty with a country that doesn't respect the Amazon forest, that doesn't respect the Paris (climate) treaty. France will not sign the Mercosur deal under these conditions," minister Elisabeth Borne said.
France's President Emmanuel Macron said late August he had decided to block the EU-Mercosur deal, accusing Brazil's President Jair Bolsonaro of lying in playing down concerns about climate change, drawing criticism from Germany and Britain.
"150 tractors are gathered in Angers! Farmers try to alert the government about their working conditions! In France, a farmer commits suicide every 2 days! This is urgent!"
On Thursday hundreds of French farmers also blocked highways with their tractors denouncing "agri-bashing" and calling for just trade policies.
The road blockade was the opening salvo of a series of demonstrations planned by two farmers unions to protest against Macron's agricultural policy.
Farmers' demonstrations were called for after the country's parliament approved an EU-Canada trade deal in July, with recent demonstrations by farmers coming on top of the ongoing "yellow vest" protests against Macron's economic policies.
French rural workers are also angry over the potential hit to their livelihoods from a provisional trade deal struck in June by the EU and the Mercosur bloc, which benefits Brazilian agribusiness.