PestsSerious
Aphids on Cannabis Plants
Aphids are small pear-shaped insects (usually green, sometimes black/pink) that cluster on stems and new growth, sucking sap and weakening the plant.
What it looks like
- ●Clusters of small pear-shaped bugs on stems and under leaves
- ●Sticky residue (honeydew) on leaves
- ●Black sooty mold growing on the honeydew
- ●Curled, distorted new growth
Quick diagnostic checks
1Strong water spray knocks them off mechanically
2Neem oil every 3 days for 2 weeks
3Release ladybugs for outdoor grows
Causes ranked by likelihood
1. Outdoor or near open windows
Most commonSigns
- ●Grow is near outdoor access
- ●Other plants infested nearby
Fix
- ✓Ladybugs eat 50+ aphids per day — release in the grow
- ✓Neem oil spray (covers eggs and adults)
- ✓Spray with soapy water (1 tsp dish soap per quart)
⚠️When to worry
Aphids reproduce fast. Large populations cause real damage in 2 weeks.
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