Bugs attacking my tomato and chilli plant - home solution to counter them (test stage)

My tomato and chilli plant has recently been infested by some kind of bugs. Tried googling them up but the descriptions does not seem like what I have in my little garden. On the underside of the leaves, there are some white moss like stuff and underneath them are specks of little black dots. So far they do not move but the leaves are starting to whittle away and curl up. And when you touch the leaves, small white bugs flies off.

 White moss stuff and black specs (after I wipes the moss off) underneath tomato leaves.

Found this home made pest control formula on the net. Trying the oil formula out. It killed one small chilli plant and my rationale was that it was so weaken by the white moss, it didnt survive the rough handling (I tried to wipe the stuff off) and the soaking with the oil formula. The other chilli trees seems to be doing fine. After the initia spray (about 6 days ago), the white stuff is returning so I sprayed another round today including parts of the tomato tree that I could reach. Think I need to spray every 2-3 days for 2 weeks for it to work.

The recipe below (taken from http://www.paystolivegreen.com/2008/12/make-your-own-homeade-pesticides-and-repellants/)

Oil Mixture

• 1 cup cooking oil ( i.e. canola or vegetable )
• 1 tablespoon liquid dishwashing soap
• Use 2 ½ teaspoons of this mixture in 1 cup of water

Spray on the surface and underside of leaves to coat insects in various stages of development.

This mixture is especially good with eggs and immature bugs. Be careful on the type of liquid soap you choose. I had good luck with dishwashing soap with no additional additives like anti-bacterial ingredients. I accidentally used it with on that had them in it and it almost killed a plant of mine.

This is how the oil mixture looks like before mixing with water.

Soap Mixture

• A few teaspoons of liquid dishwashing soap
• 1 gallon of water

Spray on the surface and underside of infested foliage. The soap acts to paralyze insects, which prevents them from feeding. The pests eventually die of starvation. For heavy infestations spray every 2 to 3 days for 2 weeks.

This is a very generic mixture that can fight off most any insects. Make sure to use a light liquid soap here as well to ensure not to kill your plants.

There is another site with bug repellant recipes that I would like to try out in the near future as well. http://www.apartmenttherapy.com/how-to-make-natural-garden-pesticides-169168