Peggy from Pickerington, Ohio writes
Beetles have killed monarch caterpillars on my milkweed.
Sevin Concentrate now contains zeta-cypermethrin which is a non-selective insecticide that will leave some residual. You can use a product like PyGanic Gardening if you want a contact kill with minimal residual. PyGanic Gardening can be used on ornamental and edible plants.
Answer last updated on: 07/05/2018