It turns maple leaves yellow, then black before they fall off.

Several fungal diseases can cause apple trees to lose their leaves. Apple scab causes olive green or black spots on the leaves. Leaves eventually drop from the tree. Rust causes orange spots on the leaves. This is a problem as the apple tree’s roots can drown and even develop a fungus (commonly called root rot). This causes the apple tree’s leaves to turn yellow and fall off. Fortunately, there are ways to improve watering and drainage for your apple trees.

When watering apple trees, you should only water when the top inches of soil gets dry.

As the apple tree leaves develop the bright red spots on their upper side, the undersides of the lesions develop small raised tubes that produce powdery, orange spores.

Jul 24, It may be just lack of water. Are you giving it lots, like two watering cans full every day in this hot weather? 3 years old is still relatively a young tree. Sep 01, There are three general reasons why trees lose their leaves early. The canopy is crowded. Some trees may have grown more leaves than they can support, so they drop leaves to conserve water in hot, dry weather.

th It's a pest or disease.