Scale Insects on Cannabis? (Brown Bumps)
Scale insects are armored pests that attach to stems and leaves, sucking sap and weakening plants. Hard to remove once established.
Scale insects on cannabis? Brown bumps on stems—see causes and analyze fast.
Common Causes
- Brought in on outdoor plants
- Poor air circulation
- Lack of natural predators
How to Tell Which One You Have
Small brown or tan bumps on stems, petioles, leaf undersides. Sticky honeydew, yellowing, stunted growth.
FAQ
Remove them?
Scrape off manually, neem oil, horticultural oil. Systemic insecticides for severe cases.
Hard to kill?
Yes, their shell protects them. Multiple treatments needed.
Prevent?
Quarantine new plants, inspect regularly, beneficial insects like parasitic wasps.