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Posts: 57
Joined: Thu May 21, 2015 9:09 pm

Does fruit scab never go?

I have a fair few fruit trees and one of the apples has some little brow marks on leaves I've removed them leaves and the rest look fine no problems on other trees. Next year is it possible for the tree to have no scab. I used a seed and oil based natural spray that seems to have definitely kept the severity of scab down on the apple tree. It seems that apples are the worst for getting scab.

If I try harder next year an throw all the old leaves away will scab not reoccur on the same tree.

Posts: 806
Joined: Fri Jul 25, 2014 11:11 am
Location: Sussex. England

Re: Does fruit scab never go?

A fungus that attacks apples and pears.
It sporolates and releases its spores during wet and warm periods....known as Mills Periods.
These happen predominantly in the spring to mid summer period.
There are no chemicals available that actual kill the fungi once it has infected the leaf or fruit.
There are a couple that have a 10 day or so ' kick back ' but I don't know if these are available to the ordinary gardener.
So ...if you feel you are at risk you have to protect the newly growing leaf and fruit during these muggy times. The sprays available just stop the spores that are falling on the tree from germinating. So you have to give a continual layer of protection onto the new leaf and fruit as they grow.
So a spray every ten days to two weeks needs to be applied during these periods.
Commercial growers would use these sprays to apply an anti mildew cover at the same time.
Some years are more worse than others and some varieties are far more prone to infection than others.
A lot of the more modern varieties like Gala can be very prone to infection.
If you are an organic grower then one of the best chemicals would be sulphur as this is recognised as an organic material.
Be aware though that it can cause russeting on some varieties.

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