Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
BugGuide Gathering
Smoky Mountains
University of Tennessee Biological Field Station
August 8-10, 2008
Details...
 
Photos from the last gathering (Minnesota 2007)

TaxonomyBrowseInfoImagesLinksBooksData
Photo#158786
Beetle-like infestation - Blattella germanica

Beetle-like infestation - Blattella germanica
Hollywood, Los Angeles County, California, USA
November 27, 2007
Size: 1/4 inch - 3/4 inch
I have been plagued by these pests at three different locations now. I first came across these bugs in an apartment in east Hollywood, CA. They were never a big problem there and I soon moved into a new apartment in West Hollywood. Apparently a few of them made the move with me, and over the past 2 years they became a near infestation. I had terrible landlords who were reluctant to do anything about it. I have now moved into a house in Temecula, CA, and once again a few of these bugs hitched a ride in some of my moving boxes and I am now finding them in every room in my house.

They congregate mainly in my kitchen, primarily the sink area. I have never found them in my food and they seem to canibalize each other regularly, as I have found a number of dead ones dismantled with live ones in close vecinity. They like the dark and scatter when I turn a light on. In my West Hollywood apartment, their main hideout was the gap between my kitchen cabinets and the wall. They also hide in the cabinets, under appliances, behind hung pictures, and even in electric sockets. Wherever they congregate in large quantities, they leave a big mess.

They are extremely resiliant. I have taken to washing them down the sink whenever I come across them, but I'm afraid that they reproduce much too quickly for me to keep up with.

Keeping the area clean or dirty doesn't seem to make a difference. A couple of months ago I was away from home for 3 straight weeks. I had hoped that without me there to provide a water source and food crumbs, their numbers might deminish, but they survived without me just fine.

They are starting to get out of control again at my new home (one just scurried across my desk while I was typing this) and I need to know what they are and what to do about them.

Thanks for taking the time to read this! In the photo, the one on the left is nearly full sized and approximately a 1/2 inch long. The one on the right is, in my estimation, a "baby." The adults appear to have wings, but none of them fly. They don't bite. The most striking feature is the pair of "racing stripes" on their heads, which are dark brown/black in color.

I have never come across any of their larve, but they do occasionally deposit a shell-like sack and I suspect that this might be linked to their reproduction.

PS - Sorry my bugs aren't as "sexy" as some of the more interesting photos on this site. :)

German Cockroach
They look to be German Cockroaches Blattella germanica

 
Yes!
I just Google Image Searched that and that is exactly what they are, although it's hard for me to tell the difference between the German Cockroach and the Asian Cockroach. Regardless, thank you!

 
See guide page
here for more info on German cockroaches. Asian cockroaches here are closely related, but they can fly and are usually outdoor dwellers in warm places. We only have images from FL so far.
The one on the right in your image is a young roach, the one on the left appears to be an adult female carrying an egg case (compare below). The young ones look similar to adults but are smaller and wingless (they have incomplete metamorphosis, so no larvae).

We used to have roaches in a CA apartment. Glue traps helped a bit (roach motels) and also tracking down their hiding places and cleaning them out when we could. They can live for weeks on practically nothing, unfortunately. See also Cockroach Control which has some non-chemical control tips

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.