Problem Diagnosis • 87% avg confidence

Brown Spots

Our analysis of 33 verified rescue cases across 31 plant species shows exactly what causes brown spots and the most effective fixes.

Quick Summary

Brown spots that wipe off easily indicate scale insect (Coccidae family) infestation on Ficus elastica. The waxy, armored exoskeletons appear as immobile brown bumps on leaf surfaces, stems, and leaf veins. Scale insects pierce plant tissue to feed on sap, excreting honeydew that promotes sooty mold growth. Indoor low-humidity environments favor scale over soft-bodied pests, with populations establishing within 2-3 weeks of introduction.

Most Effective Solutions

  1. 1 Improve air circulation with a small fan.
  2. 2 Inspect all plant surfaces with 10x loupe: undersides of leaves, stem joints, leaf veins
  3. 3 Apply 70% isopropyl alcohol to paper towel and wipe every visible scale to dissolve waxy coating

Affected Plants

31 species

rubber plant

Ficus elastica

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1 diagnosis 89%

pothos

Epipremnum aureum

🌿
1 diagnosis 91%

philodendron

Philodendron spp.

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1 diagnosis 92%

snake plant

Dracaena trifasciata

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1 diagnosis 91%

alocasia

Alocasia spp.

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1 diagnosis 90%

anthurium

Anthurium spp.

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1 diagnosis 92%

calathea

Goeppertia spp.

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1 diagnosis 88%

jade plant

Crassula ovata

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1 diagnosis 88%

bird of paradise

Strelitzia reginae

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1 diagnosis 92%

zz plant

Zamioculcas zamiifolia

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1 diagnosis 89%

orchid

Phalaenopsis spp.

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1 diagnosis 88%

aloe vera

Aloe vera

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1 diagnosis 82%

dieffenbachia

Dieffenbachia spp.

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1 diagnosis 87%

chinese evergreen

Aglaonema spp.

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1 diagnosis 87%

fiddle leaf fig

Ficus lyrata

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1 diagnosis 88%

parlor palm

Chamaedorea elegans

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1 diagnosis 90%

peperomia

Peperomia spp.

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1 diagnosis 87%

tradescantia

Tradescantia spp.

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1 diagnosis 78%

prayer plant

Maranta leuconeura

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1 diagnosis 92%

rattlesnake plant

Goeppertia insignis

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1 diagnosis 71%

pink princess

Philodendron erubescens 'Pink Princess'

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1 diagnosis 81%

alocasia frydek

Alocasia micholitziana 'Frydek'

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1 diagnosis 78%

majesty palm

Ravenea rivularis

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1 diagnosis 90%

pilea peperomioides

Pilea peperomioides

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1 diagnosis 90%

monstera adansonii

Monstera adansonii

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1 diagnosis 90%

english ivy

Hedera helix

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1 diagnosis 88%

dracaena

Dracaena spp.

🌿
1 diagnosis 92%

monstera deliciosa

Monstera deliciosa

🌿
1 diagnosis 89%

fiddle-leaf-fig

🌿
1 diagnosis 91%

boston fern

Nephrolepis exaltata

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1 diagnosis 85%

chamaedorea elegans

🌿
1 diagnosis 86%

Frequently Asked Questions

What causes brown spots?
Brown spots that wipe off easily indicate scale insect (Coccidae family) infestation on Ficus elastica. The waxy, armored exoskeletons appear as immobile brown bumps on leaf surfaces, stems, and leaf veins. Scale insects pierce plant tissue to feed on sap, excreting honeydew that promotes sooty mold growth. Indoor low-humidity environments favor scale over soft-bodied pests, with populations establishing within 2-3 weeks of introduction.
How do I fix it?
  1. Improve air circulation with a small fan.
  2. Inspect all plant surfaces with 10x loupe: undersides of leaves, stem joints, leaf veins
  3. Apply 70% isopropyl alcohol to paper towel and wipe every visible scale to dissolve waxy coating
Which plants are most affected?
rubber plant, pothos, philodendron, snake plant, alocasia and 26 others show significant incidence in our database.
Can it be prevented?
Quarantine all new plants for minimum 14 days. Inspect undersides of leaves weekly with magnifying glass. Maintain 40-60% humidity to strengthen plant defenses. Avoid over-fertilizing which attracts sap-feeding pests.
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