They can grow up to 30 feet tall, and the Bradford pear can be dangerous because of its weak branch structure, which means that the trees often break … Pear Disease - Pear Leaf Spot Fungus The pear leaf spot fungus, Mycosphaerella pyri, infects the leaves of pear, quince, and occasionally apple trees. As the infection spreads, it moves to the branches, which may ooze a sticky milky liquid when it rains. Bradford pear also has problems due to the environment. Numerous leaf spots can produce defoliation. Pear Tree Rust Disease - a Fungus growth - can affect both Pear tree leaves and also those of the Juniper family.. If iron treatment doesn't help, you might try applying a micronutrient fertilizer to the soil at the dripline of the tree. If conditions favor the disease and it is not controlled, pear trees may become defoliated in a few weeks. A soil test can help determine if salt is the problem. While the Bradford pear resists common diseases, susceptible trees may contract a bacterial infection known as fire blight (Erwinia amylovora). I cut off the offending branches (which has grown considerably since I first noticed it). Experts warn that it's a mistake to plant the Pyrus calleryana 'Bradford', and rightly so: The limbs of these fast-growing trees break too easily in stormy weather. Leaf Spot Disease: This is a fungal disease that has the capacity of devaluating of the beauty and health of the ornamental pear trees. In the summer, the top of the leaf is a shiny green while the bottom side is a dull green in the fall, the leaves turn reddish purple. Keith, we purchased a small Bradford Pear tree this year and it is developing some kind of infection/mold on the branches. Additional … Bradford Pear Fire Blight Causes And Treatment Read More » When you perform your regular inspections on your property, it is very important to keep an eye out for signs that indicate serious diseases. But there is no doubt they can suffer from a couple of very serious pests, pear midge being the most common and probably the most difficult to eradicate. An arborist will locate, prune off and dispose of the affected branches to stop the spread of the bacteria. If this is the case, use an iron chelate or iron sulfate application to the soil. One such disease with symptoms you can notice early is Bradford pear fire blight. I have 3 Bradford Pear trees that appear to be dying. In your case, the damage has already been done and the right time to spray is past. Blister disease Coniothecium chomatosporum: Blue mold rot Penicillium spp. Q:  Parts of my bottlebrush tree are dying and it appears to be growing leaves and flowers only on one side of the tree. Leaf Spot Disease Bradford pear trees are quite susceptible to fire blight, a quick-spreading bacterial disease. Another possibility is salt accumulation in the root zone. Pear trees are susceptible to damage from strong winds. All varieties should be staked for the first three to five years. But it goes after other fruit trees as well like apple, crabapple, quince and hawthorn trees. If you are just installing pear trees, look for cultivars with some resistance to this disease. This disease causes primarily only aesthetic damage on ornamental pear trees, and is considered a nuisance problem, rather than causing significant harm to the health of the tree. What would cause this? Iron deficiency can cause the chlorosis (yellowing) symptoms you have described. ‘Bradford’ flowering pear is actually moderately resistant to fire blight while ‘Aristocrat’ and ‘Capital’ are highly susceptible. 2016: Rust Diseases of Apples and Pears. It does put on new growth every year. The leaf spotting that affects pear trees, including both edible pears and ornamental ‘Bradford’ types, is caused by a fungal disease known as Entomosporium leaf spot. Read on for more information about fixing pear tree problems. I have noticed several other Bradford pear trees with the same sort of problem, notably the row along Terrace Drive behind Memorial Medical Center. One possibility could be iron deficiency. A study was reported of an experiment on the NC State University campus, where 6 'Bradford' trees were inoculated with the organism that causes fireblight. Rust causes a distinctive orange (rusty) colored powder to form on the fruit and leaves. Black rot, leaf spot and canker Botryosphaeria obtusa Sphaeropsis malorum [anamorph] Black spot (of Japanese pear) Alternaria alternata. `Bradford' is the original introduction of callery pear and has an inferior branching habit when compared to other cultivars which have since been developed. A Bradford Pear will grow up to 25 feet in height with light grey bark. The Bradford Pear Tree originated in China and were introduced in 1964 by the US Department of Agriculture as an ornamental tree. Fruit is non-ornamental and hidden by the ... ' was not resistant. Learn more about pear tree diseases and treatment in this article. But the relatively short life span (about 25 to 30 years) makes it necessary to replace individuals more frequently than with most other street or screen trees. The Bradford Pear was introduced as an ornamental tree in 1964 by the U.S. Department of Agriculture. Bradford Pear is a variety of pear tree native to Korea and China called Pyrus calleryana introduced into western horticulture in1908. But it goes after other fruit trees as well like apple, crabapple, quince and hawthorn trees. Such treatments are most effective before mid-summer. Bradford Pear trees get fire blight, where the twigs and branches turn black and may form a crook. This article in Scaffolds Fruit Journal reviews the six species of rust diseases that can occur on apples and pears in the Northeastern United States and measures for controlling them. The fire blight disease is the most powerful pest. Pear Background, Life History Callery pear (Pyrus calleryana) is a deciduous tree, more commonly known as ‘Bradford pear.’ Native to China, it was first brought to the United States in 1917 for hybrid-ization experiments to improve disease resistance of the common fruiting pear. Bradford Pear leaves are oval to heart-shaped 2 to 3 inches long and wide with small teeth around the edges, which means it resembles the shape of a saw blade. Fire blight is a common problem of the species where the ends of twigs and leaves become blackened as the disease progresses further down the branches. For years, the Bradford pear has been an iconic Southern tree (simply because they're everywhere). What is ‘Bradford’ Callery pear fire blight? 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