Deficiency for Parasite problem? Please help

So I started seeing an issue with some of my plants a couple of weeks ago. I flushed each of them, but it didn't really seem to help. Today I found a strange critter in my garden. From what I can tell from pictures it was an Aphid. Little guy jumps around like crazy.

Either way this is a problem that I have to address. I have attached some photos of what I thought was a deficiency, but now I'm wondering if it's a parasite issue. Any thoughts? I'm not really sure what an aphid does to a plant.

http://www.greenmanspage.com/guides/plant_abuse.html use this bro