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in close proximity. Where trees are suffering stress as a result of drought or waterlogging, they may be more liable to infection. Canker may also infect fruit, so they rot on the tree before harvesting or when in store. If your trees have suffered

The cause of the splits is invariably irregular watering. When the tree suddenly gets a hefty drink following a period of drought, the apples quickly expand, which often leads to the skin cracking. The fruit usually produces a corky, scab

, such as canker, can set in.Congregations of fluffy, white, waxy aphids cause localised swellings on branches. If the swellings split open in winter, infections can set in.Blast off the fluffy, sticky aphid mass with a high-speed jet of water. This won't cure

bees that visit the flowers may be killed by traces of these chemicals in the pollen and nectar. horse chestnuts, magnolias, cornus, bay, lime and acer trees. May-SeptemberMore common apple and pear trees problemsCankerEuonymus scaleLeaf miner fly