That old bit of kitchen wisdom that for every roach you see, there are 10 you don't see -- forget it. For every one you see there can be 1,000 you don't see, according to Richard S. Patterson, who studies cockroaches in the Agriculture Department's Insects Affecting Man and Animals Laboratory.
While the presence of one cockroach in your home can be enough to send you into a panic, one roach doesn't necessarily mean you have a full blown infestation. Roaches are social pests, however, and reproduce quickly.
Unfortunately, cockroaches are not loners. If you see one, there are likely many more that you can't see. Cockroaches are nocturnal creatures, so you'll most likely spot them late at night, especially if you walk into your kitchen and turn on the light.
In a word, yes. Some cockroach females don't actually need a mate to reproduce. On top of that, it's unlikely that the lone cockroach you've seen is the only one in your home. Cockroaches are excellent at hiding and the one you've seen may be a sign that there are others nearby.
Number Of Roaches In An Infestation. You might be seeing two to ten cockroaches in a day. But if it exceeds ten, you should start worrying. This may be an indication that you're not only having a cockroach problem but an infestation.
Is One Roach a Sign of Infestation? | Pest Support
How fast do roaches multiply?
At their peak, females can produce two egg cases a week, each containing up to 16 eggs, but after that, their reproductive capacity declines to about one case a month. The eggs incubate for six to eight weeks. In her lifetime, one female produces an average of 150 young.
You can lure cockroaches out of hiding with sticky traps, bait, or DIY lures. Commercial bait traps are made of high-grade poison that has a tempting aroma. This lures out roaches that eat the bait, bring traces back to their colony, and then die.
For best results, combine equal parts borax and white table sugar. Dust the mixture any place you've seen roach activity. When the roaches consume the borax, it will dehydrate them and kill them rapidly.
If you see one cockroach, check out the dark, concealed corners of your home for more bugs, live or dead. This will give you an idea of where their nest is, which will confirm whether or not you have an infestation and can also help with your eradication efforts.
Cockroaches have an incredible sense of smell that they use to find food. You can take advantage of this fact by using scents they dislike such as thyme, citrus, basil, mint, and citronella to repel them from your home.
Finding a cockroach nest means finding several (or several dozen) cockroaches and, probably, a few dead ones. You'll also see plenty of roach droppings and old egg cases lying around. Cockroach droppings are tiny and look like coffee grounds or black pepper. Droppings start to collect in areas with high activity.
While cockroaches are one of the most common pest problems, they are also one of the most stubborn. Infestations are hard to get rid of because the insects hide in a host of areas, breed quickly, have a very high reproductive potential and may develop resistance to pesticides.
In areas with high moisture, cockroaches will produce dark, irregular shaped smear marks as they crawl along walls or even when they rest. You may see these marks on horizontal surfaces and at wall-floor junctions where cockroaches are most active.
Baby cockroaches are about as bad a sign as you can find. See, finding a big brown adult cockroach could mean you've just caught one lonely wanderer. Finding baby roaches signals that, at the very least, there are a few adults nearby and they're ready to reproduce again.
Roaches will use clothing as a hiding spot. They can tuck themselves away in the back of closets or infest the drawers of your wardrobe. Even laundry baskets will serve as cover, allowing them to burrow through the layers and hide. For clothing stored in boxes, this provides a dark, secluded area for them to nest.
We've recently heard a rumor that squishing a cockroach is a bad idea because it could spread the insect's eggs around, making more baby cockroaches. "The crushing in itself doesn't really spread eggs," said Louis Sorkin, a scientist in the entomology department at the American Museum of Natural History.
If you touch a cockroach, you risk becoming infected with some serious diseases, including bacteria that cause dysentery. According to the World Health Organization, cockroaches commonly transmit these diseases to humans: Salmonellosis. Typhoid Fever.
Vacuuming can easily remove many roaches, but it raises dust. A special filter (called HEPA) is available for many brands of vacuums to help control dust. Most roaches will be killed by vacuuming, but it's a good idea to change the vac- uum cleaner bag often and dispose of it in a double garbage bag.
It is normal for roaches to come out once they spray and for two weeks, you will see lots of them but don't be afraid. It is typical to see them wandering around since they have been sprayed so they will look for food sources or water for them to thrive.
Once the problem is under control and you do not see any more roaches, it is recommended to spray something once every 30 to 60 days inside and outside your home to help keep the problem from coming back. Spraying inside and outside every 30 to 60 days will also keep all other pests out of your home.