Yikes, we lost all of our North Star tart Cherries - in SW Mpls by Lake Harriet. Normally we get gallons of perfect fruit. Unfortunately no photos but I will describe: leaves and bark look ok. Had normal blossoms. First noticed brown rotting under the skin, some fruit completely ripe while other fruits were still green. Normally we pick july 4th but this year June 24. Cherries had half brown sides, some with fungus spots where overripe. We found also tiny creamy colored maggots about 1/8 inch long. I googled brown rot and cherry fruit fly. Neither exactly fits. We have to prevent this next year please! Do we need to spray? What and when. We picked the tree and ground clean. Is it the early spring and wet weather? Please help! Heartbroken!