HBi

I started noticing the node leaves to curl slightly Yesterday, this is how it looks now:

This tree had white flies on Friday and I sprayed it with very diluted soap on Friday after asking this question.

The white flies are gone and I'm not sure if the soap could have caused this?

I also think it is worth mentioning that it is a hard/stiff curl and it is only happening with the node leaves.

Any advice would be appreciated. 

@SkunkPharm

Thank you very much for your help.

@SkunkPharm

I just had a look under the leaves:

There is white flies and I'm not sure what the black spots are?

Do you know what I can use to get rid of them?

I did some research, but I'm still not sure what could be causing this (please see image below).

My first thought was that I was over watering, but watering less did not help.

The plants are growing outside in full son and I'm watering with rain water.

I've only given them fertilizer twice.

It happens to all my plants and only the first two nodes.

Any help would be appreciated.