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Lemon Tree Sooty Mold: Aphids, Horticultural Soap, Professional Spray

Cause

Black residue on leaves/fruit = sooty mold on aphid honeydew. Aphids on undersides.

Treatment

Horticultural soap/oil from nursery.
Mix per label, spray with sprayer.
If tree too large: hire tree spraying company.

Shrubs: Meyer Lemon Fruit Deformities: Genetic Quirks, Not Disease; Lemon Fruit Brown Spots: Cosmetic, Washable, Cultural Fixes Needed; Meyer Lemon "Tan" Fruit: Environmental Disorder, Not Disease; Diagnosing Lemon Tree Issues: Scale, Fruit Spots, and Mysterious Grey Coating; Troubleshooting Meyer and Lisbon Lemon Trees: Curl, Scale, and Low Yield; Caring for a Meyer Lemon Tree: Fertilizing and Rat Deterrence; Troubleshooting Leaf Drop on an Indoor Meyer Lemon Tree; Meyer Lemon Winter Damage in Cold Climate: Shelter & Feed; Old Lemon Tree Decline After Repotting and Pruning; Meyer Lemon Leaf Drop from Overfertilization and Salt Buildup

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