Orchid Fungicides and Insecticides: Consan 20, Cygon 2E, and Homemade Oil Soap

Chemical Choices for Orchid Pests and Disease

Grower uses Consan 20 fungicide, Cygon 2E systemic insecticide, and Schultz 3-in-1. Home Depot suggested homemade oil-soap spray.

Expert Take

• Consan 20: Unfamiliar—research before use.
• Cygon 2E: Effective but highly toxic. Many discontinued it. Systemic = slow uptake; contact = fast kill. Use gloves, ventilation.
• Recommended: Imidacloprid-based (e.g., Bayer Tree & Shrub) or Orthene WP.
• Homemade oil-soap: 4 tbsp oil + 4 tsp dish soap/gal. Works on contact only—won't reach media pests. Repot first, then spray mornings with air movement.

Best Practice

Repot into fresh media to eliminate soil pests. Then target foliage pests with appropriate chemicals. Rotate modes of action to prevent resistance.