Pyrethrin Damage on Butterworts and Sundews: Alternatives

Garrett has persistent aphids on sundews and butterworts. Pyrethrin burns new growth on butterworts and removes dew from sundews. Asks if spraying leaves is wrong and for other aphid controls.

Expert Advice: Carrier Issue, Try Systemic

Jeff Dallas says carrier (surfactant) often causes damage. Tips:

• Spray only crowns, not open leaves (aphids attack centers).
• Spray at night (cooler = less damage).
• Use systemic like Bayer Rose & Flower (imidacloprid)—lasts ~1 month, no leaf damage.
• For severe infestations, consider No-Pest strips in enclosed area (not living spaces).

Follow-Up: Crown Damage Persists

Garrett says crown damage occurs on butterworts. Jeff advises stopping current product, switching to Bayer systemic (absorbed by roots, not leaves). Link provided. No-pest strip not feasible in dorm room. Bayer has low odor.

Good Growing!

Jeff Dallas
Sarracenia Northwest
www.cobraplant.com