The invasiveness of 'Bradford' pears has become so bad that a county in Kentucky is offering a free alternative tree to anyone who cuts down a 'Bradford' in their yard. lives on live tissue, and a dead tree serves no useful purpose to the The two are related, since insects can spread or facilitate other pear tree issues. There are three common types of pear rust disease. following year. But it goes after other fruit trees as well like apple, crabapple, quince and hawthorn trees. Similar spore stages on pear are produced on apple, crabapple, hawthorn, mountain ash, quince and serviceberry (Amelanchier). The orange rust on pear leaves won’t hurt the tree. The host plants for both Trellis rust and European rust are juniper trees (Pyrus and Juniperus). The disease can be treated if it is caught in time. In the case of Juniper infection, it will be necessary to remove leaves and also those of the Juniper family. Juniper Tree or shrub. It is easily identified, though has to be 'looked for' during It was introduced into the United States from Europe in the 1990s and has been progressively spreading through states in both the East and West. But there are a few diseases that you must be in the lookout. Do not use nitrogen-heavy fertilizers on pear trees. The two are related, since insects can spread or facilitate other pear tree issues. found. European Rust – Orange spots in summer and fall on leaves. Both of these diseases require an alternate host within about a 1,000-foot radius for the disease to occur. Pear trellis rust is caused by the fungus Gymnosporangium sabinae. If it is concentrated in one area of the tree, you can cut that part out and observe the rest over time. And, as the disease progresses, the spots grow and the leaves turns red and eventually drop. If you have an orchard with pear trees, expect to encounter pear tree diseases and pear tree insect problems. Remove interior branches that are connecting or growing haphazardly. Similar to other common rust disease, pear rust requires two different hosts to complete their life cycle from year to year; juniper, being the winter host, and pear being the summer host. The spores are airborne and overwinter in the evergreen foliage of conifer trees. Trellis Rust – yellow/orange spots infect leaves, twigs, and fruit. If you prune the tree while it is dormant in late winter, you can remove quite a bit of growth without hurting it. Practice good sanitation. It will however weaken the tree for the current and Disease - a Fungus growth - can affect both Pear tree Prune out all branches that overlap, crowd each other, or come off at less than 60-degree angles. Gardenerdy explains the occurrence of such diseases, and also suggests some preventive measures that can be taken to avoid infections. hosts. If European pear rust is detected in your nursery or landscape, prune out infected branches or remove the entire tree, depending on the severity of infection. Unfortunately, pear trees are susceptible to a fungus called "pear trellis rust." It consists of little orange spikes that are coming right out of the fruits. Fire blight is a persistent disease that affects ‘Bradford’ Callery pear (and other ornamental pear trees). Pacific Coast Rust – Yellow spots after flowering appear. A: Your Bradford pear fruit is infected with cedar-quince rust. gardener) that is specifically for the treatment of Pear Rust. As a gardener, you can prevent many problems with pears by appropriate spraying and pruning. Because the rust often overwinters on junipers, which provides a source of inoculum for the pear trees in the spring, try to inspect nearby junipers for cankers prior to the winter. Read on for more information about fixing pear tree problems. Bradford Pear rust disease help. 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