Tuesday's protest was the latest incident in what has been an eventful Tour de France, as fans have expressed outrage about Froome's participation.
"The last few days I felt really good, which is a good sign", said Martin. They must be respected, they take enough risks for their job.
According to French media, the small group of farmers from the local Ariege department protested against the reduction of European Union funding.
Geraint Thomas retains his lead at the top of the overall leaderboard, with fellow Briton and Team Sky rider Froome 1 minute and 39 seconds behind.
Gilbert suffered a heavy fall on the descent of the Col de Portet-d'Aspet, where Fabio Casartelli crashed and died during the 1995 Tour.
Police were said to be arresting some protesters after farmers threw hay bales across the road before the peloton's arrival.
Froome, race leader Geraint Thomas, and world champion Peter Sagan appeared to be among those affected by the chemical, and were treated with eye drops.
White House Admits Tariffs Are Hurting Farmers As It Plans Relief Program
To date, every time that the Trump administration has imposed a tariff on China, China has imposed an equal tariff on US goods. Trump is tweeting that trade partners need to either negotiate a "fair deal, or it gets hit with Tariffs.
Stage 16 of Le Tour 2018 sees the riders make their way 218 kilometers from Carcassonne to Bagnres-de-Luchon.
'This will bring a little more show because the teams will be scattered at the start and they will have to rebuild themselves in the first pass where the road will be narrow, ' Mauduit said.
Gilbert has since been ruled out of resuming the Tour after a scan revealed he had sustained a fractured kneecap in the crash. "There was a bit of downforce or something and I came down, that's all there is to it".
The last time a Tour stage was blocked by a demonstration was in 2004.
With the roads still slightly damp from an earlier brief downpour, Yates' wheels slipped from beneath him and he never quite regained his confidence and composure as his 25-second lead evaporated.
After the Formula 1-style grid start in Bagneres-de-Luchon, which saw overall leader Thomas line up directly ahead of Froome and Dumoulin, it was Estonian rider Tanel Kangert who led the breakaway.
Stage 17 is a 65 km trek from Bagneres-de-Luchon to Saint-Lary-Soulan on Wednesday.