The Q&A Archives: North Star Cherry tree

Question: Last summer my cherry tree which is about 5 years old developed black spots on its leaves that then turned yellow and prematurely dropped off its branches. My local extention said it had a fungus disease and to be sure to pick up all the dead leaves as soon as they fall, which I did. Beyond that they couldn't tell me what treatment it needed to combat the fungus. It had a great crop of cherries.

Answer: Cherry trees can develop fungal diseases when the spring weather is wet so some years your tree may have fungal problems and other years it may not. To protect the tree against fungal diseases you can spray the tree three times during the bloom period: suggested intervals are 'early, when you see red or pink showing on the buds'; one more spray when the tree is in full bloom, and a final spray after the petals have dropped.

Chemicals registered for home use include Daconil, Captan, and Spectracide Immunox. Check the label carefully for all instructions and be sure that cherries are listed on the label. Since the tree has edible fruit, it's necessary to find a product listing 'fruiting cherry' on the label. Best wishes with your tree!

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