whitefly in greenhouse

[whalesong]

Food grade diatomaceous earth is an excellent natural way to help control and eliminate flies. Many of us use it largely for fly control purposes. To use diatomaceous earth to lower and eliminate fly infestations, you need to do the following:
http://wolfcreekranch1.tripod.com/diatom...flies.html

I spot treat my plants, by diluting food grade diatomaceous earth in a spray bottle, be sure the water is warm and shake it well, spray on infected area.
Get rid of any guava trees around your greenhouse, they are infested with them and no matter what you use to rid white flies, if you keep the guava trees, you will always have them.
Great site for information on all the creepy critters!
http://www.arbico-organics.com/category/...e-whitefly