White Sand-Like Material on Orchid Roots: Mealybugs?

Likely Mealybug Infestation

White, sand-like material around roots and lower stems spreading to all plants = mealybugs. They hide in root zones and leaf folds, multiply fast, and spread easily.

Diagnosis Needed

A photo would confirm. Mealybugs appear fluffy/cottony in clusters. Check leaves too—they're often there first.

Action Plan

• Isolate affected plants immediately.
• Treat with systemic insecticide drench after flowering.
• Repot in fresh mix; discard old pot and mix.