Blueberries help - my blueberries continue to struggle with an unknown disease or problem: many leaves and side branches turn brown then shrivel and die. When I cut off the dead part, about a week or so later the end of the newly cut branch begins to die and creeps towards the center of the plant. If the dead part passes a section of blueberries, the fruit begin to shrivel and look severely dehydrated, more like tiny raisins. I live in New York. They get plenty of water, good half-day sun (am), and fertilizer for acid loving plants. Please help me solve the mistery, and give me some advice to help it. Many thanks.