horticultural Soap for aphids-novice question

Spaying my greenhouse aubergines against greenfly with a vitax 2 in one  organic spray seems to be a daily activity. I have read that you can use a weak household detergent. Please can someone give me an example of something (eg a brand name would help)which works and can I just used a teaspoon of fairy liquid in a half litre of water. Being a man, I 'm not really sure what a household detergent is!

im not sure if this site allows people to give advice on using pesticides that are homemade? - but as im not sure i will give you the answer you are looking for  .

Yes i have found household detregent to work on aphids - aphids breath through pores on their body, the soapy solution covers them and basically prevents the aphid from breathng.

And yes when it says household detergent it means soap - so fairy liquid will be fine, howver you only need a drop or two, shake the spray bottle up, them spray on the plants.

* didn't get their fast enough - but ive gone a little further in my answer than MOS so i will reply anway

I have to squash some scale insects that like invading my Acer but I do this with some rubber gloves on as they are so sticky    but I use ecover washing up liquid as my "household detergent" only because I just think it might be more plant friendly 

I use a few soap flakes dissolved in warm water and it seems to work well. :-)