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David from Fuquay Varina, Nc writes

Can you use Bonide Liquid Copper Fungicide Concentrate on an ornamental cherry when the temperature is above 80?

I have been told not to use this on my ornamental cherry for leaf spot when the temp is over 80 degrees - is this true? It now often gets near 90 degrees by the end of the day - so thought I could spray early in the day but do not want to cause problems.

Answer:

Like most products, Bonide Liquid Copper Fungicide Concentrate should not be used in temperatures over 85 degrees. We usually recommend that you spray early in the morning or in the evening when the temperatures are usually cooler and the product will have time to dry before temperatures reach 85 or above. Spraying in the heat of the day will cause the foliage to burn.

Answer last updated on: 07/06/2017

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