Aphids on apples

I am growing or should I say trying to grow apple trees here in central Florida and it so far is doable. The one thing I have had constant issues with is a very small green bug called "aphid" its a simple looking little bug, however it would be a huge mistake to underestimate them. I have found that the new tinder growth is their target and they will stop at nothing to milk the sap out of it. Having said all of that I have found a method to control them and I use the word control very lightly, because that is all I can do is control them. How you ask! Sulfur orchard spray by Bonide.