Japanese Maple Pest ID

[Pepe Sylvia]

This is a Seiryu japanese maple and im not sure what is on the trunk.

 

[August44]

Are those non-moving larva or do they move? Never mind...just kill em

 

[namnhi]

I do have those on some of my trees but not sure what they are. Some type of scales... I don't think they do much harm if the numbers are not big to where it cover the entire branch. They should be able to rub off.

 

[Wires_Guy_wires]

Looks like maggots!
Have you been fertilizing? Could be that something laid eggs, it rained, and the maggots crawled up to get some air.

Could be hover fly larvae, which eat aphids. But those larvae always turn up after the aphids do.