Silver Streaks? (Thrips Damage)
Thrips scrape leaves leaving silver streaks and black specks (frass).
Thrips on cannabis? Silver streaks/black specks—see causes and analyze fast.
Common Causes
- Thrips infestation
- Bringing clones in
- Open vents/screens
How to Tell Which One You Have
Silvery streaks + tiny black dots; check undersides.
FAQ
How to treat?
IPM: soap + beneficials + airflow; repeat.
Systemic?
Use only safe options per grow stage.
Do they spread virus?
They can; act quickly.
Browse problem guides
- Purple Stems? (Cold, Genetics, or Stress)
- Slow/Wilt After Transplant?
- Leaf Miners on Cannabis? (Tunnel-Making Larvae)
- Slow Vegetative Growth? (Plant Not Growing)
- Alternaria Leaf Spot? (Target Spot)
- Stunted Growth? (Plant Not Getting Bigger)
- Leaves Turning Yellow Overnight? (Sudden Yellowing)
- Crispy Leaves? (Dry Brittle Foliage)