How to Clean Spotted Leaves on a Lemon Tree

Lemon trees are susceptible to diseases and insect attacks that can turn the leaves colors or create a fungus or mold. The insects that ooze sticky substances encourage fungus growth, which can take over and kill the leaves. If you have a problem with black spots on your lemon tree leaves, you can stop the progress and possibly remove the unsightly black fungus to restore your tree to a more appealing look.

• 1

  Spray the tree with an insecticide that kills the insect that is causing the sooty mold fungus. Several insects can create the secretion that causes black mold spots. The insecticide will kill the bugs and end the spots. Make sure you spray both sides of all the leaves.

• 2

  Apply a second time after 10 to 14 days to ensure any remaining bugs are removed, recommends Citrus Tree Care.

• 3

  Spray the tree with fungicide once the insects are gone. The fungicide will kill the fungus on the leaves. Once dead, it will normally wash off the leaves.

• 4

  Wait two weeks and apply fungicide second time to kill all of the fungus. Spray both sides of the leaves. Once dead, you can wipe off the fungus with a rag and warm water if you choose. Hosing down the leaves can also remove most of the spots, once the fungus is dead.

• 5

  Rake up dead leaves to prevent the tree, or other trees, from being reinfected with the fungus.