The plane tree tiger can potentially touch all plane trees.
It is caused by the attack of a stink bug that "sucks" the back of the leaf.
This results in the appearance of whitish and blackish plaques as well as the fall of the leaves.
Solution for the fight against the plane tree tiger:
Spraying an insecticide is a known and most effective method.
But to respect our planet, there is a method applicable to organic gardening.
It is simply a matter of high-pressure leaching of trunks and carpenter branches with rapeseed vegetable oil to find and stifle pests.