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Black Cockroach

Several species of cockroach are dark-colored or black. At first glance, many of them may look similar. However, they are very different and the same treatment usually will not work for all of them.

One of the most common black cockroaches is the oriental roach. An adult female is about 1¼” long. The males are slightly shorter than the females. Oriental cockroaches are usually shiny black. The adults do not have fully developed wings, so most of the abdomen is exposed.

Oriental cockroaches prefer damp areas that are somewhat cool. It is common to find them under ivy or ground cover. They also hide in water meter boxes and drains. These roaches do not fly and they cannot climb smooth vertical surfaces, so when they move into homes they are usually in the basement or at ground level.

If black cockroaches start to be a problem, the best approach is to go outside and look around. See if there are hiding places that the cockroaches could be using. Is the firewood stacked next to the house? Put it up onto a rack and move it as far away from the house as possible.

If there is ivy or ground cover, it should be trimmed back away from the foundation. Mulch and dead leaves should also be raked away from the foundation.

Exterior doors should fit tightly and there should not be a gap under the door. Replace weather-stripping if necessary. The crawl space access door should fit securely and the vents should all have screens.

If liquid insecticide is applied to the outside foundation, it will help make a barrier. It will help prevent the black cockroaches from gathering near the house. Because sun and rain will break down insecticide, the barrier will have to be re-applied periodically.

Granular roach bait is also an effective tool for controlling black cockroaches. Many brands of bait are water-resistant, so they can be applied in water meter boxes, flowerbeds, and ground cover.

Cockroach control usually requires follow-up. One treatment will usually not solve a cockroach problem. Because of this, many homeowners prefer to have pest control professionals make the bait and insecticide applications and keep the black cockroaches under control.

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