ASK RON

How can I control mosquitoes in my bird bath without harming the birds and other wildlife?

Rebecca

Costa Mesa

You should use a product called a mosquito dunk. This is a completely biological product with a fancy name of Bacillus thuringiensis israelensis and is harmless to birds, fish, frogs, pets, people and other wildlife. The dunks float in the water and look like a giant Life Saver, but can be broken into smaller pieces for a fountain or birdbath. The dunks kill mosquitoes for 30 days or longer when placed in standing water outdoors.

? Ron Vanderhoff, the Coastal Gardener