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Pest Library

House Mosquitoes

CHARACTERISTICS
Size: Color:
About ½ inch in length. Pale brown with whitish bands across the abdomen.

Behaviour

The house mosquito is actually a type of fly with a thin body, thin wings and thin legs. The females are easily recognised by the long thin probsocis, or mouthparts, extending from the bottom, from of the head.

Only the female mosquito bites; male mosquitoes feed on the nectar in flowers. When a mosquito bites, she injects an anticoagulating agent into the skin to prevent the blood from clotting and allowing her to feed. It is the body's immune response to the anticoagulant that causes the raddened welts and itching. People have varying reactions to mosquito bites, with some individuals experiencing rather large welts and severe itching. 

Habitat

House mosquito larvae breed in standing water that remains fairly calm and undisturbed,. larvae are common along the edges of a pond or a ditch, but they will not be found in a quick-running stream or creek. As a rule of thumb, any water that stands for at least seven days can breed mosquitoes. Often, mosquito outbreak occur within two weeks of heavyrainfall where ditches, puddles and other low-lying areas fill up with water. 

Mosquitoes that attack people in their own yard are usually breeding close by one of the property or on adjacent properties. Most mosquitoes found around homes are known as "tree hole" or "container" mosquitoes. This species does not breed in a natural body of water, rather the female seeks out accumulated water in hollows in trees; in water-capturing plants such as bromelads; or in manmade cintainers such as bird baths, barrels cars, clogged gutters and old tires. 

Tips for Control

Complete control or elimination of house mosquitoes around any roperty is not possible. Mosquito reduction, however, is very possible and involves a number of components: 

Habitat Reduction

Empty and refill birdbaths at least once per week.
Drill holes in the bottom of tire swings to prevent rainwater from accumulating.
Avoid using barrels or other containers to capture rainwater unless the container is emptied every few days.
Empty children's "kiddie" pools regularly.
Examine gutters regularly. Conditions, such as debris or loose guttering, should be corrected.
Fill in accessible tree holes with a material that will not harm the tree. Check with a local nursery for advice.
Use soil to fill in low areas in lawns and landscaped areas that allow rainwater to collect and stand for more than seven days.
Install an agitator in garden ponds used in landscaping or buy fish that eat mosquito larvae. The wave actions created by an agitator can prevent mosquito adults from successfully emerging from pupae.

Controlling Mosquito Larvae

For properties that have ditches, small ponds or decorative garden ponds, environmentally friendly mosquito larvicides can be applied to the water by a pest professional in areas in which mosquitoes can breed.
The insect growth regulator (IGR), methoprene, affects only insects, interfering with a mosquito larva’s ability to pupate into an adult. IGR products are generally applied about once every 30 days to help reduce mosquito populations.
Bacterial mosquito control products that affect only mosquito larvae also can be used, but such products require specific timing in order to obtain maximum results.

Controlling Adult Mosquitoe

The best way to limit mosquitoes is to prevent adult mosquitoes from developing by eliminating or treating breeding sources as described above. Because some adult mosquitoes are most likely always going to be present, treatments can be applied around a home to control as many as possible.
A pest professional can apply residual products to shrubs and other vegetation around the home and yard. Since mosquitoes spend most of their time during the day resting in vegetation, such treatments can effectively reduce mosquito populations. Such treatments need to be periodically reapplied during the warm months when mosquitoes are active.
Some of the mosquito traps available commercially do attract and capture large numbers of mosquitoes. Concern may exist that such traps may draw mosquitoes from adjacent properties, so locating the trap at the perimeter of the property is preferable to placing it next to the patio, deck, etc. where people are active.

 

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