Each type of pest requires a specific line of action.
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The least toxic method of dealing with fire ants is to drench the mound with boiling water. Even if this doesn't kill all the ants, it should convince the remaining ones to move. After the water, you should use an insect growth regulator such as Logic, an insect-specific poison that causes sterility in the queen and developing young. A decline in ant population should be noticed after about six to eight weeks.
Logic works best when applied in the early spring after the ants have begun to forage. It need only be applied once a year, except for the first year, when a large infestation can be treated again in midsummer. If there are ants in the garden, apply only around the garden's edge. Don't apply any directly on the garden. Also, to minimize drift, don't apply on windy days.
Logic has low toxicity to other organisms, except for aquatic invertebrates and bees. Make sure not to get any granules on flowers or into wetlands. Most other organisms should be unaffected by it, and it will not bioaccumulate.
Spray a mild soap and water solution mixed at a ratio of 95% water to 5% soap over the infected area. Use a biodegradable soap or a pet shampoo containing D-Limonene and linalool. A light dusting of diatomaceous earth will also work. Keeping grass clipped and weeds pulled will decrease moisture in your yard. Fleas need lots of humidity to thrive.
If you need to control mosquitoes around a pond, try stocking the pond with Gambusia, a mosquito eating fish. Guppies and goldfish will quickly reduce larvae numbers. Gambusia is well suited for polluted waters, and a good candidate for sewage treatment ponds, ditches, and irrigated rice fields. Another option is bacillus thuringiensis israeli (usually referred to as B.t.), a common bacteria that attacks caterpillars and grubs. Various subspecies are targeted towards mosquito larvae. B.t. prevents the larvae from developing into biting adults.
Encouraging natural enemies such as birds and bats to nest on your property is another good way to control mosquitoes. Erecting a house for purple marlins can be an enjoyable way to control mosquitoes. Refer to bird books to see which birds are specific to your area.
To prevent biting, leave the mosquitoes alone and apply repellents to yourself and clothing. Herbal formulas are considered safer; ones containing eucalyptus and/or citronella oils should give good results even though they will have to be reapplied more often then their chemical counterparts. Diethlytuolomide or "Deet" is the most often used chemical repellent. However, it can dissolve plastic in high concentrations and will destroy paint. Do not use this on children and infants since their smaller bodies will result in a higher body concentration.
For the occasional fly, keep a spray bottle of rubbing alcohol present. Douse any flies that are a nuisance. A common fly swatter will also work. Use a non-chemical fly trap if your problem has escalated or if the flies are of a biting nature.
If you have a nest on your property which you would like removed, call a bee keeper or the local agriculture department. They can safely remove the nest.