Systemic vs. Non-Systemic Fungicides for Orchids

Understanding Fungicide Types: Prevention Over Cure

Unlike insecticides, fungicides are largely non-systemic (contact/protectant). They prevent spore germination but don’t cure established infections.

Effective Strategy

• Remove all visibly infected tissue immediately.
• Seal cuts with sulfur or similar fungicide.
• Apply protectant sprays periodically to kill landing spores.

Key Quote

“Fungicides are not curative… the only positive curative is to discard infected material upon diagnosis.” — Plant pathologist.