Wow. Ill keep spraying my 17 trees until I can afford an orchard that size..... Ha who am I kidding, I am going olive if I ever get around to it, the lazy man's tree. I think the best advise for home growers is stick to the resistant varieties of citrus and leave the bulk stuff to the big boys. Continue to spray your foliar sprays and keep them as healthy as possible which unlike normal giant groves is much more doable and cheaper than it is on a big scale. Or just go with non citrus fruit trees, for many of us, this is Florida after all.