Apple Foliage Problems - Knowledgebase Question

Norristown, PA
Avatar for MaslinL
Question by MaslinL
June 10, 1998
I recently planted two dwarf apple trees of different varieties. One has some leaves that look like they're covered in a white powder. The other has some leaves with orange spots. What's happening? Is it a problem?

Answer from NGA
June 10, 1998
Unfortunately, based on your description it sounds as though one is suffering from powdery mildew and the other is showing early signs of cedar apple rust infection. While some varieties are tolerant of the mildew, the cedar apple rust is generally fairly serious. You might wish to take samples to your County Extension office for positive identification of the problems and suggested control recommendations, if any.

Apples are susceptible to a wide range of diseases, so many home orchardists find it worthwhile to follow a routine preventive spray schedule based on both the particular apple varieties they are growing and on the diseases most prevalent in their local vicinity; the weather during any given year can also make a difference in the optimum spray routine and schedule. The County Extension staff should also be able to provide you with current spray guidelines for apples grown in your area and help you determine a schedule suitable for your trees.

You must be signed in before you can post questions or answers. Click here to join!

« Return to the Garden Knowledgebase Homepage

Member Login:

( No account? Join now! )

Today's site banner is by IrisLilli and is called "Tulipa 'Ollioules'"

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.