The causal agent is the fungus Taphrina carveri.The disease may go unnoticed until a large number of leaves are severely infected and begin to fall from the tree. Scorched leaves are more evident on the sides of the trees most exposed to prevailing winds and strong sunlight. Eventually the amount of leaves (or fruits) will decrease. Due to the root, plant structural, and photosynthesis issues which many pests can cause, depending in the pest and severity of the infestation, it can cause curled up leaves. One of these fungal diseases, Verticillium wilt, is prevalent among Japanese maples. For 20 years we’ve had a Japanese maple in perfect health. {{gwi:387119}} Thanks, Nancy. Hi, I've had a red maple tree and the leaves are all curled up. Over time the leaves will become thicker and softer. Leaves on the same branch often show similar symptoms but an entire tree may not be uniformly affected. The rest of the tree bloomed out normally, but within a month the leaves did the same thing as last year. Wilted or curling leaves that may turn brown at the tips or edge; A sparse canopy of off-color and undersized leaves, leaf scorch or yellowing leaves; Untimely fall color and early leaf drop ... “The grass quickly slurps up the sprinkler’s water, leaving your tree thirsty. The second tree produced leaves, but they did not completely “unfurl” either – look smaller than usual. Among the usual suspects for dying leaves are several fungal diseases and aphids. This spring, one started to produce leaves, but then suddenly stopped. There are certain bugs and pests which are known to cause the curling of cannabis leaves. For the last two years the tree’s leaves have started curling and burning up in early June. These browning symptoms begin first on the youngest (newest) leaves which are more delicate and sensitive to water loss. I used recommended soil for weeping and tree shrub for other. Entire leaves may curl and wither when leaf scorch is severe. To care for your popular tree treat the fungus with a natural plant cleaner. We have two 25 year old sugar maple trees in our yard – always beautiful. I have been watering regularly. I recently uprooted it and out it in a nice open area. Since then, it has slowly but steadily lost all its leaves by curling, drying up and falling off. A foliar disease called leaf blister has been common on silver and red maples and their hybrids during the past few weeks. The curling is caused by a fungus. Email Save Comment 8. Conifer needles turn a pale green or blue-green color before turning brittle, browning and dropping off. peaches20. I have a weeping japanese maple and a red burg any type both are curling my weeping one yellowed and now browning and the red one the leaves are curling live in Plano, Texas and have them in containers under patio please I have backed off watering and testing soil . Maple trees can have any number of diseases and other problems that can cause leaves to develop spots, turn yellow or brown--or die. red Maple leaves curling please help. i had a Japanese maple tree that was in a bad area, other trees were around it and it hindered its growth. The other cause of curling leaves could be bugs and pests. We've been getting plenty of rain for the last two weeks. What does it mean when you find your plant's leaves are curling? Not one single leaf has grown over the past 5 months. Any help appreciated. The tree has remained mostly bare, with sparse “baby” leaves with curled up brown edges. This Spring considerable dead branches had to be cut back. 7 years ago. Leaf curl is a disease of the tree and if left untreated your popular tree will eventually die. Here is one answer to maple leaf curl: Taphrina Leaf Curl (quote) Taphrina leaf curl -- also known as maple leaf blister (Taphrina carveri) -- strikes unfurling maple leaves in early spring. I don't know what's causing this. Deciduous tree leaves will wilt and if corrective steps are not immediately taken, may eventually turn brown and drop.