Needlecast diseases cause spruce trees to lose their needles. A common fungal disease, Cytospora canker generally affects older blue spruce trees but may also infect Norway spruce. What kind of diseases affect blue spruce trees? Get landscape help and help your community. Needlecasts. Cytospora canker refers to a fungal disease in which the pathogen resides under the bark of twigs and branches, and causes entire branches to die back to the trunk. They have a very elegant and clean appearance that lends itself well to a professional setting. Our clay soils are good for sugar maples, but difficult for the roots of spruces to penetrate and thrive in. Some pathologists believe it is a key causal factor in spruce decline in Michigan. As a result, blue spruce trees planted in Michigan are often more prone to fungal diseases. It’s why you should have your spruce trees inspected on a routine basis by a professional landscape service. But being a new homeowner can often be overwhelming. Trimming off the infected branches back to the trunk will reduce inoculum and slow the spread of the disease. Usually the lower branches are first to die, but sometimes the disease begins in the upper crown or at multiple points. The outside of a house should be just as special as, Your home is a long-term investment. The thought of, There is a lot of excitement and expectation that comes from purchasing a new home. Blue spruce trees are widely planted due to their good growth rate, stately form and, of course, their blue foliage. With insects, control is relatively easy: see a bug, spray it, and it rolls on its back, kicks up its six legs and dies. Diseases old and new: insects are (in general) easy on spruces, but the fungal diseases are numerous and their numbers are growing. However, in some plantations needle casting symptoms still occur after sprays (Photos 1 and 2). These are seven facts you should know about blue spruce disease in Michigan. Well-timed sprays in the spring will normally suppress Rhizosphaera to non-detectable levels in the population of trees. Tip blights are another form of fungal disease that causes dieback to emerging shoots. When creating a landscape design, there are certain spaces that can be a challenge. It’s a fungus that infects the needles of the current year’s shoots. Trees planted close together in groups or close together in a tree line tend to especially be affected by this disease. Common Blue Spruce Diseases Common pine tree diseases include Rhizosphaera needle cast and Cytospora canker fungus. For other diseases, such as canker diseases, fungicides may not be as beneficial. Some of the diseases are familiar: Rhizosphaera needle-cast causes older needles (i.e., those not at the ends of the twigs) to turn purplish and subsequently fall off. As a result, the galls resemble cones. Whereas spruce decline is widely recognized to be occurring throughout the Midwest, there is uncertainty and debate about the extent to which other pathogens might be involved. Hiring a snow removal company to service your HOA community is important for a stress-free winter. With crab apples, a couple sprays in early spring are sufficient since the time of disease spread is very predictable. As the disease develops, the needles will die. This Phomopsis disease may be the one most aggressively attacking Norway spruce. Many homeowners experience standing water in their yards, but most don’t know how to address it. I will try to break down our understanding of spruce decline into environmental and biotic factors. All rights reserved. They can interfere with the tree’s ability to transport water and nutrients, which is why it often leads to flagging (which is the term used when individual branches die off). Diseases old and new: insects are (in general) easy on spruces, but the fungal diseases are numerous and their numbers are growing. There are several forms of needlecast diseases that are common in spruce trees. The Colorado blue spruce tree has been one of the most popular types of conifers for commercial landscaping throughout Michigan for years now. If you notice water puddles in your yard after a rainstorm that don’t dry up right away, you may have drainage issues. Copyright © 2020 Green Street Tree Care. Fungicides can be particularly effective for treating needlecasts in order to protect new growth; however, it may require yearly applications for two to three years. Insects can cause great harm to spruce trees as well. Fungal diseases can be difficult to spot — as can the presence of certain insects. … There are so many factors contributing to their decline that it has become nearly impossible to tease them apart. Often a white resin will drip from the infected branches. Inconspicuous cankers develop on lower branches—the cankers … It’s where your family will grow, Building a new home isn’t just about the roof, floors, and doors. But an insufficient patio space can put a damper on plans to, Secretary/Treasurer of Doral Creek Condominium Association, Ann Arbor, Michigan. Sometimes the purple discoloration, which usually shows up in late summer, is shocking.What remains … Blue Spruce Trees Can be Infected by Insects. Well, it doesn't have to be. During the summer, the humidity of Michigan provides an environment that fungal pathogens thrive in. Most of the species in the landscape come from mountainous habitats where the air is dry and the soils are cool and reliably moist.Two severe droughts in the last three summers have been hard on landscape spruces. A house just isn't a home without landscaping. A good landscape service will be able to catch any issues that your trees have early on, allowing them to take action to prevent further damage. If your home is beautiful during the day, it can be just as beautiful at night with the right lighting design. Compound that with an eroding, Most Michiganders like to head outside when the weather allows. These areas often leak resin. The cankers that develop are caused by a fungus that infects the branches or main stems of the tree. In the real world of landscape plant management, it is only practical to spray two or three times a season, and those applications are timed to coincide when disease spread is most likely. Given that the fungal spores need water for germination, disease control usually involves spraying the fungicide in between rainy periods, so that when the environment is conducive to disease spread, the fungicide is in place to act as a preventative. Spruce spider mites are technically spiders and not insects; however, they can cause discoloration of the spruce needles, which will eventually die if affected. The plain truth is that the more often the trees are sprayed with fungicide, the more likely it is to achieve disease control. Sometimes it pays to put some effort into it in order to make it more livable and, The outside of your home is just as important as the interior. A species of Phomopsis fungus once know only from nurseries has now been found in the landscape. Most commonly fungicides used in the landscape only act as prophylactics. If your home doesn’t already have outdoor lighting, you may have considered installing it. Some of the diseases are familiar: Rhizosphaera needle-cast causes older needles (i.e., those not at the ends of the twigs) to turn purplish and subsequently fall off. So many factors contributing to their decline that it has become nearly impossible to tease them.. Common pine tree diseases include Rhizosphaera needle cast and Cytospora canker generally affects older blue spruce trees suck plant through... 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