lint? see if you can tweeze one of the specks off and see if it's a thread or dust or something like that.
maggot is concerning.. again, pull one off if it's a egg or something it'll be gooey or at least moist, lol.
would need a better magnification to fully rule out fungus, but certain it is not powdery mildew at the least.
Not what is on your finger though.. the thread-like looking stuff.. in 2nd picture there's a 2 or 3 on the stem.