An organic way to get rid of whiteflies?
I described the state of affairs in three simple words: "Yellowy and buggy."
Yep, that's pretty much how it looks and feels these days. With the weather being so hot and humid, most of the plants (with the few exceptions being tomatoes and basil) look as if they're just barely hanging on. This is usually how it is here in July; everything in the garden gets kind of withery and weak and bug-infested, and the oppressive heat leaves me with little desire to do anything about it.
That is... except for the whiteflies. I am willing to start an all-out assault on those!
My one little Brussels sprout plant was growing up perfectly, until about a week ago when I pulled back its leaves and witnessed The Swarm -- that unmistakable swirl of little white pests, flitting away from their cozy hideaway underneath. Every one of my cole crops has gotten afflicted with whiteflies at some point, and now, again, the Brussels sprouts have them. Enough is enough!
So... I need help from all you fellow gardeners. What is an effective, organic solution to whiteflies? Is there a non-chemical way to get rid of them -- completely?