In Arkansas the high humidity levels mean there just about isn't a period where Rhizoctonia isn't present. Sorry I should have mentioned this in my first post.
Our
land is rife with many species of fungi, bacteria and most forms of micro organisms, mostly beneficial thankfully.
This was done on purpose by me for the benefit of our soil it has taken three years to get to the point where if we cut a tree and let it lay on the soil for more than a week, it starts to rot from the hyphae growing in the cambium layer.
Cut
wood that has been kiln dried starts to show fungi fruit within two years of being put in contact with our soil. We consider this a good thing even though it means replacing ground contact wood every 3-4 years (
raised garden beds between orchard
trees).
This year we have not watered any of our established orchard trees, only the newly planted ones have needed any
water even in the 4 week periods of no rains (happened twice this year).
This draught resistance is because of the abundant soil microbiology that has been established, it even took care of the beets and tomatoes (tomatoes are grown in straw bales).