Can someone help me identify the problem?

[Loginid]

Hello,

Can someone please help me identify the problem with my peppers?

Maybe I sprayed too much white oil on them to stop the aphids and this has damaged the leaves?

Or is this something kind of pest?

Here's a picture:

20220405-111027 hosted at ImgBB

Image 20220405-111027 hosted in ImgBB

ibb.co

 

[YumYum]

I'm guessing its sooty mold.

Stop Sooty Mold Fungus From Attacking Your Plants | Gardener's Path

Do your plants suddenly look like they are covered in a layer of black soot? Learn how to identify and manage sooty mold now on Gardener's Path.

gardenerspath.com

Maybe the oil helped the mold grow quicker?
I've had it before too and there are plenty of aphids here also.

Make sure the aphids are dead. They may be back if their eggs are hiding.

 

[DirtMechanic]

The leaves are also a bit chlorotic, and curling with stress. There is a very good chance that pot is too small for the pepper plant. They can have huge roots as they come from a place where searching for water and nutrients deep was the standard.