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Apple and pear scab

Symptoms

Brown blotches or scabs on the leaves of flowering shoots or on fruit. Splits may develop on young shoots. Foliage may fall prematurely from trees.

Find it on: apples, pears
Time to act: winter, spring, summer

Overview

Apple and pear scab is most prevalent in mild, damp seasons. The fungus overwinters on fallen leaves in the form of spores, which can be splashed by rain or carried in the wind to infect newly emerged shoots in spring. Overwintering can also occur on infected stems and branches. The most serious consequence of scab is reduced vigour of the trees caused by early leaf fall. This may limit the crop of fruit. The disease also causes scabs on the skins of fruit, although they are still edible. A preventative measure would be to use resistant varieties. Try desert apples such as Ashmeads Kernal, Discovery, Egremont Russet and cookers such as Lord Derby and Reverend.W.Wilks. For scab resistant pears try Beurre Hardy and also Josepine de malines.


Solution

Brown blotches or scabs on the leaves of flowering shoots or on fruit. Splits may develop on young shoots. Foliage may fall prematurely from trees.

Organic

Rake up fallen leaves at the end of the growing season and dispose of them - don't add them to your compost heap. Liaise with neighbours who have fruit trees to make sure they practise similar hygiene. Choose scab-resistance fruit varieties, and plant trees in open, sunny positions.

Chemical

As soon as the leaves emerge until late July, spray plants regularly with a fungicide that contains myclobutanil as the active ingredient.




Discuss this problem

Talkback: Apple and pear scab
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Suzibabs 24/11/2011 at 15:28

My apple tree leaves are diseased. The top of the leaf looks like apple scab, the underside is white /orange and raised slightly fluffy. Is this apple scab? If I cut off all the infected leaves will that stop it from re-occuring or do I have to treat the whole tree?
Cheers
S

patrician 24/11/2011 at 15:28

my pears have black fungal type marks on them which disfigures. In the past i have used a seaweed mulch and it worked but this year it has notworked, altho recently mulched some months ago.
One tree not mulched, after years of not fruiting is the only one in fruit. It seems they are all very old and i inherited them 20 yrs ago. Am at a loss what to do next.

John-H 24/11/2011 at 15:28

I have a cooking apple tree which HAD a lot of fruit,the leaves are turning blotchly brown curling with some holes and i have lost over half of the fruit
I have sprayed but without change, could it be a lack of something in the ground. HELP PLEASE

veggiepatch 24/11/2011 at 15:29

My cooking apples have brown spots in the flesh. What is the cause and treatment please

shestews44 24/11/2011 at 15:29

Will see if this works.

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