Cause: This is caused by the fungus Podosphaera leucotricha. It overwinters in apple buds or on young stem growth - which can be seen as silvery white patches on the bark.
Control: Keep the plants well watered to prevent development. Mulch to preseve soil moisture. Prune out severely affected stems. Ensure the tree is pruned to ensure good air circulation.
Just to let you know that although I don't often leave a comment I do read your blog. I enjoy your interesting and informative postings. Pamela
ReplyDeleteHi Pam, thank you for your comment. It is much appreciated :) All the best, Tim
DeleteWhen you water your apple plants, water them carefully. To prevent the growth of mildew, water your plants at root level. This is most important when it is hot outside. Avoid getting water on the leaves, especially if you water your plants shortly before it is nighttime.
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Hi Roman, thanks for your comment. The garden that has this tree in is unfortunately in the shade, with that and the weather this year it's been unlucky! Good advice, though!
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