Saving Petunias from Aphids and Caterpillars: Early Intervention Is Key

Assessing the Damage

Hollow stems indicate advanced infestation; the plants may be beyond saving. Cutting them back to 3 inches might stimulate a late flush of blooms in about four weeks.

Effective Insecticides

• Powdered insecticides: Rotenone (organic) or Sevin dust (chemical) provide longer residual control than sprays. Reapply after rain.
• Companion planting: Interplant garlic and onions near susceptible flowers; aphids dislike the odor.

Lesson for Next Year

Monitor early and act at first sign of pests. Contact sprays only work on direct hit; powders and systemic products offer better protection.