Repeat until the plant begins to recover. Because of the stark contrast between the infected silver leaves and unaffected green leaves on the same branch, this disease is easy to identify. Treatment for silver leaf fungal disease is the same as for a tree that’s infected with cherry leaf curl disease. Even though this is a nontransmissible disease, trees should be removed because they’ll never produce a harvest of good cherries. The fungus overwinters in dead leaves and then in the spring, apothecia develop. Once you spot the telltale disease symptoms, fungicides cannot cure the disease. Remove infected branches and dispose of them. The best way to prevent the disease from adversely affecting your tree is to keep it healthy. What Causes Brown Edges on Apple Tree Leaves?→. The fungus overwinters in dead leaves and then in the spring, apothecia develop. She is also a former mortgage acquisition specialist for Freddie Mac in Atlanta, GA. The fungus spreads on water, sticking in the cracks of the tree's bark and on newly developing buds. Leaves infected by the fungus will appear thickened and discoloured. Insecticidal soaps will control aphids, but the challenge with this method lies in being able to apply the soap to all leaf surfaces, many of which are out of reach. This is one of the worst cherry tree diseases. The curl is about 10' up right now, so can't see exactly what's going on, but we're guessing insects. You can, however, prevent the spread of fungal spores by pruning off infected branches. However, they do happen, and they can have severe consequences if you don’t treat them quickly. It only infects the tree if the moisture level of the soil is very high, like when the tree grows in standing water. The treatment of leaf curl depends on the cause of the leaf curl. Apply a 3-inch layer of mulch each spring to the area around your tree to stifle weed growth and help the soil retain moisture. After studying botany and microbiology at Clemson University, Blackstone was a University of Georgia Master Gardener Coordinator. and some plums (Prunus spp.). Some cherry tree diseases cause the leaves to curl, but this symptom may also point to other stress factors such as insect problems or adverse reactions to certain chemicals. The curl is about 10' up right now, so can't see exactly what's going on, but we're guessing insects. Leaf curl is typically a late sign of an advanced infestation, either from an insect pest or a fungal infection. A proliferation of non-fruit-bearing shoots appears on branch tips, generally fan-shaped, which gives the appearance of a broom. Another virus that infects cherry trees is the rugose mosaic virus. Using pesticides labeled for use on aphids is one control option, but this method will harm honeybees. From what I know of this leaf curl disease preventative treatment with the proper fungicides should allow your tree to produce nice foliage and abundant fruit again. Leaves infected by the fungus will appear thickened and discoloured. An unmistakable symptom of cherry leaf curl is the appearance of “witches’ brooms” on branches. Although unattractive, the disease is not life-threatening to the tree. Silvery lines or trail on the new leaves means your tree has citrus leafminer. Another disease that affects cherry trees is silver leaf. Cherry Tree Visual Disease Identification. Salt (from seaside spray or roadside deicing products), excessive application of nitrogen fertilizer (or from the application of a quick-release nitrogen fertilizer) and chemical drift can cause cherry tree leaves to curl and twist before they turn yellow and brown and fall off. The upper sides of leaves are silvery, and they curl lengthwise along the midrib as the disease progresses. Apply a 3-inch layer of mulch each spring to the area around your tree to stifle weed growth and help the soil retain moisture. Leaf curl is typically a late sign of an advanced infestation, either from an insect pest or a fungal infection.