Nepenthes Rust Spots: Thrips Damage, Not Disease

Uniform rust spots spreading on N. ventricosa? Thrips feeding damage.

Diagnosis

• Irregular spots on one old leaf = natural aging/fungus.
• Uniform spots across plant = insect bites. Thrips are tiny, hard to see.
• Damage is permanent—focus on prevention.

Treatment Options

1. Neem oil (natural, dual pest/fungus action, smells bad). Safer brand ready-to-use.
2. Pyrethrin (organic, effective). Safer brand.
3. Bayer Disease Control (systemic, 4-week protection, prevents insects/mites/fungus).

Avoid

Insecticidal soap—harms carnivorous plants.

Repeat treatment in 7 days. Monitor new growth for clean leaves.