The stem damage in the image appears to be longitudinal, up the stem. Weevil damage is different...lots of divets which may girdle the tree killing it. From a single image it is impossible to call what has killed that tree but unless the stem is 'girdled' right round the tree should have survived so maybe an overspray with glyphosate , which is OK at the correct dose when the tree is dormant and will kill surrounding grasses....but if here is life in the buds of the tree, there is a risk yhe tree will actively absorb chemical and game over.