Is this white powdery mildew?

[Bomeray]

It’s only in these 3 locations and it hasn’t spread, it wipes off a little but i feel it goes away with moisture not touch. If it is, is my best bet to just cut off the effected areas ?

 

[bobby.digital]

Yes, and yes.

 

[ezenzyme]

look into Lactic acid bacteria or LABS. best PM treatment round'

 

[nashobaTHC]

Cut small areas and stay vigilant.

 

[Beachwalker]

Consider Liquid copper fungicide