Your post is interesting -

Several years ago, we had a hoard of whitefly - so thick in fact, that the trees/bushes looked like they were covered with snow.

I began a systematic hosing of water each morning to control them. This was done on days when the tree/bush would dry out before night time.

At this time, I have no evidence of white fly anywhere, and none for the past 2 years. Someone mentioned that the "powers that be" set loose a predator that wiped out the whitefly in California. Sorry, I can't recall the details. But I still think hosing them off regularly, did a lot of good as well.

Bejay

Bejay, thats what I had -- the leaves were completely covered. The area they were infesting was starting to grow fast so I decided I had better do something. In fact I should have done something when I first saw it -- any time all the leaf surface gets covered its an epidemic level and I don't think the predators can keep up. When I wrote the above it was bad on one tree only, but subsequently about 20 trees got infested -- all my apricots and European plums in that one spot. For some reason they stayed away from the other fruits even though they were interplanted. I sprayed Stylet Oil on them last night, and I am going to keep on them with something or other every day now until I wipe them all out. Today I will trim off many of the shoot tips, a summer pruning. Since the flies greatly prefer the new leaves it takes away their food.

I wonder what brought on this outbreak. I have had them before in moderate quantities but nothing like this.

Scott