I am new to this gardening thing and need some help as to what to do!
I was wondering if there is any gardening solution to pest control without using pesticides, the kind of pests I am interested in controlling a whitefly, greenfly etc...

Hiya Tommy - a solution of soft soap in a spray is the way to go, I think, but if you put 'soft soap for aphid control' into google it'll take you to lots of info. Hope this helps.

Cheers!