Arabica Coffee Tree Scale Infestation: Identification & Non-Toxic Treatment

Your 5-foot coffee tree has classic scale insects: translucent oval crawlers → hard brown domes (adults) on leaf undersides/stems, plus sticky honeydew on leaves/floor. Scale is persistent but manageable with thorough, repeated treatment.

Scale Life Cycle & Detection

• Crawlers (young): Tiny, pale, mobile, no shell. Most vulnerable stage.
• Adults: Immobile, brown, hemispherical shells. Protected from sprays.
• Honeydew: Sticky excretion → sooty mold (black fungus).

Treatment Protocol (Repeat 3–4× at 7-day Intervals)

1. Physical removal: Scrape off adults with fingernail/soft brush. Rinse plant.
2. Spray options (choose one):
   • Rubbing alcohol: 1 part 70% isopropyl : 5 parts water + 1 tsp dish soap/quart.
   • Horticultural oil: SunSpray Ultra-Fine or similar, per label.
   • Neem oil: Dilute per label; add few drops Pine-Sol to mask odor.
   • Hot Pepper Wax: Per label (cayenne-based).
   • Brand X Foliage Cleaner: Silicon-based; penetrates crevices (southwestplantscape.com).
3. Apply to drip point on all surfaces—undersides, stems, soil, pot.
4. Repeat in 5–7 days to catch crawlers missed first round.
5. Weekly monitoring thereafter.

Critical Rules

• Never spray in direct sun or >75°F.
• Test on few leaves first; wait 48 hrs.
• Isolate plant during treatment.
• Check all nearby plants.

Persistence eliminates scale. Your tree's vigor (flowering/fruiting) means it will recover fully.