The bark beetle crisis has affected spruce forests in the north-eastern quarter of France since the summer of 2018 and is experiencing a very worrying development. Bark beetle populations are constantly growing and moving, causing massive mortality in trees and forests in Grand Est and Bourgogne-Franche-Comté.  All the lights are red, the intensification of the bark beetle crisis is clear. Following the exceptional climatic conditions, the findings in the field are very alarming. They show an increase in the number of spruce trees ravaged by bark beetles and make sanitary cuts inevitable in the affected ...