Scale Insect Infestation on Dendrobium: Alcohol and Systemic Treatment

Identification

White granular coating at leaf bases = scale insects.

Treatment

1. Rub affected areas with alcohol-soaked Q-tips—if insects come off, confirmed.
2. Isolate plant.
3. If in pot, discard pot and mix. Repot in fresh mix.
4. Apply systemic insecticide (granules preferred) to kill hatching eggs.
5. Alternatively, soak bare-root plant in labeled insecticide solution 1 hour.

Wear gloves; follow label.