Organic Aphid & Whitefly Control for Potted Petunias

Potted petunias plagued by aphids and whiteflies? Skip synthetic sprays—use integrated pest management (IPM) with beneficial insects and organic sprays.

Beneficial Insects (Order Online)

• Encarsia formosa (tiny parasitic wasp): Targets greenhouse whitefly. Needs bright light (650+ foot-candles).
• Eretmocerus eremicus: Better for silverleaf whitefly.
• Sources: GreenMethods, Gardener's Supply, Biobest.

Organic Sprays (DIY or Commercial)

• Insecticidal soap: 1 tbsp Castile soap/gallon water. Spray thoroughly, repeat weekly.
• Neem oil: Disrupts feeding/reproduction.
• Garlic/pepper sprays: Homemade repellents.

Critical Rules

• Never combine beneficials with insecticidal soap/sprays—they kill your allies.
• Plant host plants (alyssum, dill, fennel) to sustain beneficials year-round.
• Monitor with yellow sticky cards.

IPM takes patience but builds a self-regulating system. Start with soap sprays for immediate knockdown, then introduce beneficials.