Curly, Distorted Leaves on Hibiscus: Pest Diagnosis Needed

Avijit in Delhi: potted plants (especially hibiscus) have curly, distorted leaves with fine white spots on undersides. Plucked affected leaves, sprayed diluted CNS-30 (cashew nut shell extract). New leaves still curly with fine brown spots on backs.

Suspected: Scale Insects

Description vague. Key question: Any stickiness on/under plant?

Next Steps

• Photo to wcreed@HorticulturalHelp.com would help.
• CNS-30 unfamiliar; other non-chemical treatments exist for common pests.
• Indoor or outdoor?

Need more info for specific advice.