Imidacloprid Dosage for Mealybugs on Houseplants

Imidacloprid Dosage for Mealybugs on Houseplants

A Canadian reader fighting mealybugs on succulents and small Aralias has Bayer Tree & Shrub (1.47% imidacloprid). Asks if 1 tbsp/gallon (1:255, 0.0058%) is correct, and about toxicity (no pets, not eating plants).

Label Rate vs. Online Advice

Label indoor rate: 1 tbsp per 0.6 gallon (or 5.1 tsp/gallon)—stronger than the 1 tbsp/gallon found online. Do the metric conversion.

Application Notes

• Systemic action takes weeks; may not reach tops of plants >5 ft.
• Consider foliar spray at same dilution for faster effect.
• Wear mask if spraying; avoid skin contact/inhalation. Imidacloprid is lower toxicity but still a pesticide.