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Control of Asian roaches is difficult due to their mobility and abundance in outdoor sites. Treatments with residual sprays inside and around the perimeter of a structure are often ineffective due to numerous infestations in mulched and wooded areas. Even if populations within a yard are reduced, reinfestation is likely because of their ability to fly relatively long distances. Plus, adults enter homes through windows and doorways, avoiding areas typically treated for control of German roaches.
If using residual spray treatments focus on the exterior of the structure and treat in late afternoon/early evening. Pay close attention to spraying areas around or close to lights and around entry point such as windows and doors. You should also spray the ground around the perimeter, especially grass, leaf piles, mulched areas, or other such places where these roaches are most likely to crawl, feed or hide. Limiting outdoor lighting from dusk until three hours after sundown will help prevent entry into the home. Sodium vapor lamps for security lighting and yellow incandescent bulbs for porch lighting are less attractive to adults and would thereby reduce attraction to lighting near buildings. Although Asian roaches are susceptible to all labeled pesticides, toxic pelletized baits applied to infested areas outdoors have provided the most reliable control.
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