This was mentioned in another thread, and I thought people might be interested more generally. It is similar to - but evolved utterly independently from- Japanese tenkara methods:
Here it is being practiced with a bamboo rod
A mosca con la canna valsesiana tradizionale in legno - YouTube
And here are people fishing the modern carbon fibre rods designed for this style:
Pesca a mosca Valsesiana - Il lancio e la cattura - YouTube
Here it is being practiced with a bamboo rod
A mosca con la canna valsesiana tradizionale in legno - YouTube
And here are people fishing the modern carbon fibre rods designed for this style:
Pesca a mosca Valsesiana - Il lancio e la cattura - YouTube