Citrus Scale Infestation on indoor citrus
What's Happening
Indoor citrus trees are particularly vulnerable to scale insects (Coccoidea family) due to the absence of natural predators in enclosed environments. These armored pests attach to leaf veins, stems, and fruit, piercing plant tissue to feed on phloem sap. Heavy infestations cause chlorosis, leaf drop, and honeydew secretion that promotes sooty mold growth. The waxy protective coating makes chemical control difficult once established.
How to Fix It
- 1
Inspect weekly: Check leaf undersides, stem joints, and fruit for raised bumps or cottony masses
- 2
Manual removal: Wipe visible scales with alcohol-soaked cotton swab or soft brush for light infestations
- 3
Horticultural oil treatment: Apply neem oil or insecticidal soap covering all plant surfaces; repeat every 7-10 days for 3-4 cycles
- 4
Systemic intervention: For severe cases, use imidacloprid soil drench following label directions for edible plants
- 5
Isolate immediately: Quarantine infested plants to prevent spread to other indoor specimens
How to Prevent It
Inspect all new plants before introduction; maintain 40-60% humidity (scale prefers dry air); wipe leaves monthly with damp cloth; introduce beneficial insects like ladybugs in greenhouse settings.