Biological mosquito control Kills mosquito larvae in standing water. Use in flower pots, tree holes, bird baths, water gardens, rain barrels, roof gutters, unused swimming pools. It Keeps working for 30 days or more. It is even Safe for fish ponds and animal troughs. Product contains: Bacillus thuringiensis sub-species israelensis primary powder (7000 aedes aegypti (aa) international toxic units (itu) per milligram primary powder (dry weight basis). Use one (1) mosquito dunk for up to 100 square feet of water surface regardless of depth. They can be used whole or broken into portions and applied to containerized standing water found near the home. They can be anchored using a string. 2 per card.
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