What is causing spots on the leaves of a Macintosh apple tree?

Answer by  mammakat (11147)

You may have Cedar Apple Rust, mites, or a condition called scab. You need to establish what your problem is to see if you have to apply fungicide in early spring, and what type. Best bet would be to consult an arborist who specializes in apple trees.

Answer by  Nikki92 (11)

Cedar apple rust fungus sounds like the culprit. The disease is not fatal to the tree or apples. It can however, weaken the apples and slow down production. The spores can float into the air and if they land on another leaf that leaf then becomes infected. You will need to provide a fungal protection

Answer by  bunnygal (262)

The spots on your Macintosh apple tree are probably caused by some sort of fungus or 'rust'. Cedar-apple rust is common where cedar trees are planted in close proximity to apple trees. Insects can also cause damage to leaves, leaving spots and dead areas behind.

Answer by  BrendaG (6111)

Cedar apple rust(CAR) comes from the eastern red cedar tree. It comes early in the year and spores can travel for miles. It leaves greasy orange/yellow spots on fruit. After becoming infected with CAR the fruit will die. Spray your tree in early spring to prevent this.

Answer by  worker5534 (518)

One type of virus may cause spots on the leaves of a Macintosh apple tree. This virus known as malus canker. It is communicable diseases. It create block spot of the leaves and also fruits.