Ps. I didn't mean that as a "too bad for you". I just cringe when I see that since I had them before and it took forever to destroy them. I ended up using extreme heat. Not sure how you could do that outdoors. Depending how big they are, maybe a very large black garbage bag tied over them. I'd think you could toss a hot shot pest strip in there too and gas them. Cut off all infected growth and burn it. Seriously. They make their way from the bottom up and will ruin you entire crop if left unchallenged.
Apparently sulphur works too, but they are so small it's hard to get proper contact with them.