Two Old Gardeners and a Blog

Having just one fruit tree in a small garden can make a huge difference but in a larger garden such a tree can grow to maturity and there can be room for another one or two. In the case of fruit bearing trees this is great news because it is often necessary to have both a male and female tree to ensure germination. However those gardeners who grow pitted fruit trees, such as plum or cherry trees, will know that these types of fruit tree can often prove to be more susceptible to disease than others.

One of the most common diseases to be seen in fruit trees is something known as ‘Brown Rot’ (so called because of it’s appearance). Most often this fruit tree disease can be seen making an appearance upon fallen fruit that has been allowed to remain on the ground for a while. Brown Rot is a fungus and as such it produces a mass of spores which can cause infection to spread onto the tree and especially the fruit.

Luckily fungus needs specific conditions in which to thrive. The usual places where fungus establishes itself are damp, dark places where the air often remains stagnant. One of the best ways to reduce the risk of fungal infection appearing on your fruit tree is to prune it properly and regularly.

To allow the free flow of air, and thus reduce dampness, it is necessary to prune fruit trees so that they are open. Once the tree has been pruned it will have an open structure that will also allow the sunlight to reach deep into the heart of the tree. Obviously a tree that is looked after well, and is given sufficient quantities of water, nutrients and sunlight, will grow well and be more able to withstand infection.

As well as pruning our fruit tree to avoid fungal infection and disease it is extremely important to continually monitor it for any signs of disease. One of the most important things to remember is that you must remove, isolate and destroy (by burning) any part of the tree that appears to have fungus. It is also strongly advised that you clear up any fallen fruit as soon as you see it and do not allow it to stay on the ground to rot, that’s asking for trouble!

Another fungal disease that can appear on a fruit tree is cytospora canker. Cytospora canker shows itself as dark patches of soft material on the branches of a tree. A large callus can form from which a substance, looking somewhat similar to gum, oozes from the bark. Usually cytospora canker appears close to or right on an old wound a it is during the healing process that it becomes infected by the pathogen.

Just like the treatment for Brown Rot the answer to cytospora canker is, again, pruning. It is incredibly important that you prune a fruit tree correctly. If it is done incorrectly you are simply inviting trouble as the wound will take far longer to heal and will be more likely to become infected. If a fruit tree is badly infected by cytospora canker the only option is to prune it back hard and hope for the best. Making sure that such pruning allows for the free flow of air and light will help speed up the healing process and therefore reduce the risk of fungal infection.

The two fungal diseases mentioned above, Brown Rot and cytospora canker, are but two of a number of different diseases which can infect a fruit tree. Fungal infections can be very problematic and even professional landscape gardeners can find themselves in some difficulty when trying to combat such a disease. Of course providing the correct amounts of water, sunlight and nutrients can greatly help a tree to grow healthy and strong. However, if you want to ensure a good annual crop from fruit trees you should really invest some time into finding out more about tree care and disease.

Landscaping Info 4U is an excellent source of gardening information including info about disease in fruit trees and general tree care