Controlling Geranium Pests in Hot Climates: Whitefly Management

Grey Moths, Black Buds, and Bee-Safe Treatment

Mallorca gardener has potted geraniums attacked by grey/silver moths/butterflies. New buds turn black and bitty; black droppings on soil. Wants prevention for next year's scented varieties.

Pest: Whitefly

Symptoms match: adults fly when disturbed; nymphs suck sap on leaf undersides → honeydew → sooty mold (black buds/droppings).

Bee-Safe Strategy: Horticultural Oil

• Spray horticultural oil (e.g., Ultra-Fine) on leaf undersides and stems.
• Oil deters egg-laying → breaks lifecycle without killing adult flies (or bees).
• Apply per label; repeat as needed.
• Avoid systemic insecticides (e.g., Bayer) on flowering plants—harm pollinators.

Cultural Support

• Remove heavily infested leaves.
• Improve air circulation.
• Yellow sticky traps catch adults.