Lemon Tree Under Verandah (for Frost Protection) Has Black, Hard To Remove Rust-like Coating On Leaves And Fruit. How Can It Be Re

Question

moved. I tried washing it with soapy water to the extent of wiping leaves, which got some off but I don’t think the leaves like all that heavy handling,not sure if they curled from that or a very cold early spring night.

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Answer 1

It sounds like soot or mold from previous aphid damage! Once you can get rid of any pests causing damage, the mold will resolve, on its own. This article will help:

https://www.gardeningknowhow.com/edible/fruits/citrus/sooty-mold-on-citrus-trees.htm