Did a bit of a search and found this:
Banana skins at the foot of plants will lure aphids away and add a dose of potassium too.
Aphids can also be lured away from your crops by placing a yellow bowl half filled with water amongst your veggies. Aphids, being attracted to yellow, will land on the water and drown. Alternatively, cut some yellow card, smear with petroleum jelly, attach to a stick and plant amongst your veggies.