Eco Friendly Pest Control Miami http://www.naturepest.com/how-to-control-german-cockroach-in-3-simple-steps/
Lets start by understanding how German cockroaches behave
German cockroaches are scavengers and will feed on many foods. They are attracted to starches, sweets, grease, and meat products however garbage is a principal food source since the are omnivorous, eating table scraps, pet food, and even book bindings. German cockroaches are mostly active at night, when they forage for food, water, and mates this is why you see them scatter when you turn on the lights.
During the day they prefer to hide in cracks and crevices and other dark sites that provide a warmth and humidity this is why you will find them primarily in your kitchen and baths. Their wide flat bodies enable them to move in and out of cracks and narrow openings with ease. The presence of them during the daytime, indicate a heavy population is present.
German Cockroaches spread several forms of gastroenteritis food poisoning, dysentery, diarrhea, and other illnesses, cockroaches carry the organisms that cause these diseases on their legs and bodies depositing them on food and utensils as the cockroaches forage. The cockroach’s excrement and cast skins also contain a number of allergens to which a great many people have allergic responses to, such as skin rashes, watery eyes and sneezing, congestion of nasal passages, and asthma.
They were most likely introduced by something that was brought in like furniture, paper or boxes. Every time I get a call from someone that has a German cockroach infestation they tell me they don’t know why they have them they keep their home very clean I have to play the detective in order to find the source so I ask three questions. When did you first notice them? Did you buy or bring in any new furniture or items into the home? Have you brought any boxes in? They will think back and say yea it was about the same time as I! And there you have it. Corrugated Boxes are by far the worst, when people move they go to the grocery store or go dumpster diving for free boxes to move all their stuff and inevitably bring home a box infested with roaches between the corrugate and they will start to hatch in their new home!
Why insecticide sprays are ineffective in controlling German cockroaches and why you should avoid using them.
Most over the counter insecticide sprays are contact sprays that belong to a class of insecticides known as pyrethroids that kill the roach on contact and have little residual effects, pyrethroids by nature have a repellent action so the insects can detect it and either hide or go around it, so if you spray a pyrethroid you killed that roach most likely a male forger and are causing the others to hide until the residual is gone but the females the eggs and the nymphs are still alive and thriving.
Why baits are the most effective method to control German Cockroaches
Modern bait formulations have been used successfully to control infestations of the German cockroach, Because of the slow-acting insecticides used in most bait formulations, unmetabolized insecticide may be excreted in the feces and oral secretions, and remain in the body of dead cockroaches. Becouse of two habits of German Cockroaches Coprophagy (consumption of feces) and necrophagy (the consumption of cadavers) a process known as Horizontal transfer of bait when nymphs take up adult-delivered bait via coprophagy resulting in secondary mortality.
How cockroach baits work
Horizontal transfer of insecticides occurs when active ingredients contained within baits are passed among individuals within an insect population. Active members of a population or foraging adults, become exposed to an insecticide, return to the nest and pass the insecticide to other members of the population that often cannot feed independently, the recipients may obtain the insecticide directly from the donors through mutual grooming, trophallaxis, necrophagy. Trophallaxis is the transfer of food or other fluids among members of a community through mouth-to-mouth (stomodeal) or anus-to-mouth (proctodeal) feeding.
In the German cockroach three methods have been shown to facilitate the horizontal transfer of insecticides using baits, ingestion of feces, ingestion of dead corpses and ingestion of regurgitated bait. This is why baits are far superior although slower acting in eliminating German cockroach infestations.
The two methods we use to eliminate German Cockroach infections.
This is our standard procedure to eliminate German Cockroach infestations.
First we perform a thorough inspection of the facility we are treating preferably with the lights OFF and using a good flashlight to identify the nesting sites. They prefer cracks and crevices where they can have three parts of their body touching a surface German Cockroaches are thigmotactic, meaning they like to be in close contact with surfaces. This is why you need to be looking into cracks.