Good evening folks , Over the past week or two I’ve noticed a mildew forming on some of the branches on my Tamuke-yama maple . The mildew is white and not thick and can easily be wiped off with a finger . The best way to describe it as a frosty effect . I’ve asked local garden centres who informed me it’s most likely powdery mildew and to use lime-sulfur but I’m hesitant for the reasons I don’t want to damage my tree it’s young , and I’m not even sure it’s powdery mildew so I turn to the forum here for your opinions . I will attach photos showering the mildew (frost looking) and it’s not on any of the leafs just on Some * of the branches nor is it anywhere near the trunk of the tree .