Garden Q&A: How can I combat the fungus that attacks my apple trees every year?

Whether you're a gardening beginner or expert, Irish Examiner columnist Peter Dowdall has the answer to your questions  

Good hygiene and airflow is key to tackling apple scab, a common fungal problem in warm and damp climates like ours, writes Peter Dowdall .File picture

Question

I have two miniature sweet apple trees, which every year are pitted by some fungus. Is there anything I can do to get rid of the problem? I would appreciate your help.

Answer

It’s most likely apple scab, a very common fungal problem, especially in our warm and damp climate. 

The key is good hygiene and airflow. 

Gather and remove all fallen leaves and any affected fruit this autumn, as the fungus overwinters there. Prune the trees in winter to open up the canopy, remove crossing branches and congestion in the centre of the crown and let in light and air, which helps leaves dry quickly after rain.

Each winter or very early spring, before bud break, spray the trees with a solution of copper sulphate and water and feed the trees with seaweed or organic fertiliser in spring to strengthen growth. 

• Got a garden question for Peter Dowdall? Email [e-mail]