A pesticide is something that kills things, so safe is a relative term here. I have used Ortho Home Defense for a while now because it is safe around animals (I have a bird and a dog) and it keeps the bugs away for a while after killing them.
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You can buy most online
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There are several techniquies like, killing the ant queen, using ant pesticides, or using poison gels and fumigating it, which is basically, use a lot of smoke to bring down the ants.
Ant pesticides can be found at many of your local hardware stores and or retailers. The larger retailers such as Walmart and Home Depot will have a greater selection for you to choose from and this could save you some money. If you problem persists then you would need to employ the services of an exterminator perhaps, just depends on which route you want to go.
Try Woolworth's. I think I have seen ant colonies there.
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If you have an ant problem in your home or garden, you need to purchase ant killer to eliminate these annoying pests. Not all ant killers are created equal, and you need to know which kind to purchase so that you do not waste your money on pesticides that do not work. When you shop for ant killer, look for a product that contains poison that the ants carry back to their nest. This causes the entire colony to die out, which solves your ant problem quickly and effectively.
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What whoever you need to tell this to is MOST LIKELY looking for is probably RAIN because it washes the chemicals and pesticides into the groundwater.
The small ant-looking bugs commonly found in homes are called ants. They can be controlled by keeping food sealed, cleaning up spills promptly, and using ant baits or sprays.