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Aphid Honeydew on Lemon Tree: Identification and Organic Control

Sticky Liquid = Aphid Excrement

The clear, sticky ooze on your lemon leaves is honeydew from aphids feeding on the sap. It doesn’t matter that the tree was started from a cutting—aphids find citrus wherever it grows.

Control

Insecticidal soap or horticultural oil sprayed on leaf undersides.
Organic option: Atomic Grow to strengthen the tree and deter aphids.

Treat promptly; heavy aphid loads can stunt new growth and promote sooty mold.

Plant Diseases: Seed-Grown Lemon Tree Leaf Issues: Water and Pot Size; Dwarf Lemon Sticky Residue: Scale or Aphid Honeydew Solution; Indoor Lemon Tree Honeydew in Ireland: Scale/Aphid Management with Neem Oil; Northern Tooth Fungus on Maple: Hard White Ooze Confirmed; Pecan Tree Dripping Sticky Honeydew? Aphid Control for a Clean Driveway; Rooting a Fig Cutting That Sprouted in Water; Rooting a Lilac Cutting from a Memorial Tree: Challenges & Protocol; Rooting Forced Cherry Blossom Cuttings – Low Success; Pruning Mature Lemon Tree: Professional Guidance Needed for Structural Cuts; Growing Dwarf Lemon Trees Indoors: Container Citrus for Small Spaces

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