I planted Habanero seeds a few months back, and I tried giving the plants ideal water quantity (i.e. not a lot), idea sun conditions (mostly morning sun), and plant it in more sandy soil. Since, they've been invaded by the larvae of these flies (that's the best way I can identify them as I'm not quite sure what they are). I made a post about it here https://www.helpfulgardener.com/forum/vi ... 81&t=61029, where you can see pictures of the initial invasion.
So I did what was suggested to me. I washed the plants under tepid water to get all the bugs off, and bought some Potassium salt spray and applied it as instructed on the container. This seemed to work for a little while, and the plants started sprouting new leaves. But then, all the larger leaves started getting attacked and would fall off.
As you can see in the picture above, all of this plant's leaves are small, because all of the larger ones have fallen off. It keeps producing new leaves, and as they grow, they all end up becoming diseased due to these insects.
In this picture, you can see what these pests look like on the leaf, and on the underside of another leaf. Their color ranges from Black, to brown, to white (looks like ash) when/if they die and don't make it to adulthood (i.e. a fly-looking bug)
Here's another image of what the leaves looks like when they've fallen off.
Finally, I was wondering whether or not I should be trimming these ends here:
Please help me out, the plants and I have been fighting these bugs for a few months and I really don't want to give up now. Thank you all so much for the help.