Chis Best thing is the old fashioned 1 tbsp cheap dishoap (or baby Shampoo) in a gal of water. Apply, wait about 15 to 20 min then rinse off. I mean cheap dishsoap, NOT anti Bacterial, NOT concentrated and NOT anything similar to PT 409. L.B. What is the best and safest method to kill off an infestation of white fly and aphids? I am growing some chillies on my window still (inside) and they are covered with aphids and white fly.. cheers Chris