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Lemon Trees

Q.Small sticky blobs or spots on leaves and fruit of an indoor lemon tree-what may be the cause?

Zone BA4 6RR | Anonymous added on October 22, 2020 | Answered

This occurs annually from about May/June. The tree is kept in a conservatory.
Can’t send photo-don’t know how.

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Certified GKH Gardening Expert
Answered on October 23, 2020

You have bugs! It may not be aphids, but it could be scale, whiteflies, or mealybugs. Insects can be microscopic, but they leave behind "honeydew," and that's most likely what you're seeing. Treat your tree with neem oil, following the instructions in this article for treating sooty mold fungus:

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