Dyna-Gro packages cold-pressed neem oil. In a 1 quart spritzer bottle, mix: 1 pint very hot water 1 teaspoon neem oil (cold-pressed or virgin oil only - Dyna-Gro packages a very good product) 4 drops Murphy's oil soap (or dishsoap) Shake well and add 1 pint of 70% isopropyl (rubbing) alcohol. Spritz Shake frequently while spritzing. Be sure to cover the entire plant. Don't spray in full sun. A little more Murphy's is ok, but unnecessary if using the isopropyl. Repeat at 1-2 week intervals as needed. Copy paste to your browser: http://homeharvest.com/insectspraysneembased.htm Al

I used to mix my own soap and found a liquid castille soap was the best. However, I think the commercial insecticidal soaps are safer and more effective. s.

"Whiteflies develop immunities to many pesticides quite rapidly and that is why none are recommended for control of them". Really now. Anyone buy that claim? What is not recommended is relying upon one mode of action ad infinitum. As for organic controls, rubbing alcohol is used by some, although for me, it seems to attract more than it takes care of. Colored sticky placards...it's fairly well documented that whitefly are attracted to yellow. Neem oil, although if your adherence to organics is due to safety issues, I may rethink that one. Insecticidal soap. How many plants are we talking about here? a few? A dozen? A greenhouse? As for your ability to locate predator bugs, this will depend upon two things: how many plants you have to treat and where you are. I have a list of suppliers of beneficial insects for the US, so unless you have so few it's not worth it, I bet we can connect you. If you have that few and that many whiteflies, you may better off starting fresh. I have a good friend who runs an insect consulting business. If she recommends an insecticide, its because she thinks it's truly the best way to deal with the problem...and it's the last thing she recommends. Most often, it's a recommendation to knock population levels down to manageable levels, other controls from there. So...how bad is it? Do you have to wear a mask when you get near your plants or else breathe in whitefly?

Many previous control discussions here the search will pull up for you for more tips. I linked 1 of them below. As Jim said - yellow sticky traps, make your own traps using Tanglefoot, DE (diatomaceous earth), or one of the many soap-based insect sprays available on the market will help. But in warm climates they tend to just keep coming back and one of the things that attracts them - other than the moisture - is excess nitrogen use on the plants. It's like a drug for them so take care with that. https://www.gardenweb.com/discussions/1618907/whiteflies-what-really-works?n=13 Dave