Newyorkrita said:I don't really know about apples but I think you have to spray them repeatedly.
The fungus lives in the leaves mostly. Or at least it spreads via the leaves. If you were able to rake up all the leaves from the year and get rid of them and not leave a single one behind to re-infest your tree the next year, you'd be able to get rid of it over winter. Problem is that there are several trees in the neighborhood that have this. Also, it is really really hard to rake up every single last leaf. So this organicide stuff.. you can spray the trunk and saturate it in the spring and keep doing it every couple of weeks and it is supposed to innoculate the tree against picking it up.. It is supposed to be a solution when you can't keep spraying the leaves of a very large tree. I plan to give it a shot but yeah, I have to constantly keep the neem oil or this organicide or something to spray the leaves of the new little tree so it doesn't pick it up. If the neighbor would treat their tree too... that would mean one less tree blowing fungus leaves into my yard. (All learned from online and marketing materials from the fungicide product so take with a grain of.. I might not know what I'm talking about...
