I have planted 2 dwarf apple trees. They will be 4 years "old" this year! Last year I noticed 2 problems---but, I could not find ANY simple advice on these 2 problems. I want to "cure them" simply and organically. One problem was a "white, fuzzy substance" and another was "black spots" on the leaves. They have not "borne fruit" as of yet.... I am not a "farmer" and I have no experience---other than EVERYTHING I plant is "organic" and I do not use "pestisides". Please help me,before it happens again, this year. I bought a bottle of "Sulfar Guard" but, I have never opened it. So far, I have done nothing to these trees---except, planted them as "sticks" about 4 years ago. PLEASE help me---but keep things SIMPLE!!