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
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