Sprinkle some safe, granular Bti** (Bacillus thuringiensis subspecies israelensis) into the bromeliad’s center tank and leaf bases where the water is standing. When used as directed on the label, Bti is safe for people, plants, animals, and fish. Most Southwest Florida home improvement stores, hardware stores, and gardening centers carry a Bti product called “Mosquito Bits.” Follow the label instructions to apply the granules to your bromeliads.
**Bti is used widely by Collier Mosquito Control District in the control of mosquito larvae. Organic farming operations also use Bti, which is a natural soil bacterium that is benign to all organisms except the larvae of mosquitoes, black flies, and fungus gnats. Learn more about Bti from this
EPA link.