When Neofabraea infect the fruit, they can cause distinct symptoms. Unfortunately, the fruit infections on the tree are latent – or in other words, not detectable – and are only observed post-harvest, about four to seven months after the fruit have been put in storage. The spores from anthracnose canker can infect the fruit at any point after bloom and throughout the growing season. Since it can be hard to spot all of the cankers, you should also apply fungicide treatments. You should prune out the cankers, remove stems or even entire trees with heavy canker infections, and burn all affected plant material if this is permitted in your area. The cankers mature in about a year and start producing spores, which infect the fruit and lead to bull’s-eye rot. Commercial growers sometimes have to replace entire orchard blocks to prevent its spread. The canker phase is considered the most serious, and these can severely damage trees. alba) that produce apple tree cankers that can lead to a fruit infection known as bull’s-eye fruit rot. It is caused by different species of Neofabraea fungi ( N. This unusual disease affects a wide array of plants, and the bacteria that cause it may be found in soils throughout the world. This is a key disease to be aware of, so that you can strike quickly at the first sign of infection and have some chance of containing its spread. The other is the highly contagious fire blight. There are two very serious apple diseases caused by bacteria. Practice Good Water Management When Planting.Sterilize Your Pruning Shears Between Cuts.How to Prevent Disease in Your Apple Trees.Phytophthora Crown Rot, Collar Rot, and Root Rot.
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