Sick trees - Knowledgebase Question

New Baden, Il
Avatar for brownra
Question by brownra
July 6, 2010
I have a apple and a peach tree. The leaves curl up and the fruit has blackish blotches on them. Do you know what might be causing this and how to cure it?

Answer from NGA
July 6, 2010
When insects feed on the leaves of your trees they exude a sticky substance called honeydew. This turns black as it ages and is commonly called sooty mold. This black substance is only on the surface of the leaves and fruit. You can scrape it off and the tissue underneath is unharmed. If this is what you are finding, controlling the insect pests will stop the sooty mold from developing. Look in the insecticide area of your garden center for fruit tree insecticides (such as Malathion) and spray according to label directions. Good luck with your trees.

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