![]() ![]() As the tree grows, the canker will continue to grow. It only affects bark that has been damaged by other issues or maple diseases.Ĭryptosporiopsis canker – The cankers from this fungus will affect young trees and starts out as a small elongated canker that looks as though someone pushed some of the bark into the tree. Steganosporium canker – This maple tree bark disease will create a brittle, black layer over the bark of the tree. The cankers of this fungus will look like small shallow depressions on the bark with warts in the center of each and will be white or grey. Valsa canker – This disease of maple trunks will normally affect only young trees or small branches. Also, if the bark is removed from the canker, there will be a layer of visible, light brown mushroom tissue. Over time, the maple tree will develop a canker that looks like a stack of paper that has been split and peeled back.Įutypella canker – The cankers of this maple tree fungus looks similar to Nectria galligena canker but the layers on the canker will normally be thicker and will not peel away from the tree trunk easily. In the spring, the maple tree will regrow a slightly thicker layer of bark over the fungus infected area and then, the following dormant season, the fungus will once again kill back the bark. Nectria galligena canker – This maple bark disease will attack the tree while it is dormant and will kill healthy bark. Occasionally, this fungus will also appear as red balls on the bark of the maple tree. These cankers can become slimy after rain or dew. Nectria cinnabarina canker – This maple tree disease can be identified by its pink and black cankers on the bark and typically affects parts of the trunk that were weak or dead. They all have the same thing in common, which is that they will create lesions (also called cankers) in the bark but these lesions will look different depending on the canker fungus that is affecting the maple bark. These fungus are the most common maple bark diseases. Several different kinds of fungi will cause cankers on a maple tree. ![]() ![]() Maple Tree Bark Diseases and Damage Canker Fungus Maple Tree Bark Disease Below you will find a list of diseases that affect maple trunk and bark. This is because bark diseases of maple trees are very visible to a tree’s owner and can often bring about dramatic changes to the tree. They are 'floor of the forest' plants and like acidic soil conditions.There are many kinds of maple tree diseases, but the ones that people are most commonly concerned with affect the trunk and bark of maple trees. Japanese maples tend to grow well in the same conditions as azaleas. If your water is hard / alkaline always use an acidifying fertilizer. A small seedling like yours cannot sit out in hot texas sun in the afternoon. ![]() If it's getting any hot sun directly on young bark not shaded by leaves then protect it some kind of wrap (that green nursery non sticky tape works) or move it to a shady spot.įiltered sun part shade is best. The unshaded bark on young trees can burn and die. I think I underwater ed for years worried about root rot. They do not want to be dry especially when it's hot or when they are growing. Bark and coarse mineral stuff (perlite, turface, granite chips, floor dry whatever is easy for you to get)Įveryone says these need drainage and that's true but don't take that to mean they need to be dry. ![]()
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