The German cockroach, Blattela germanica (photo), or the supella longipalpa, appear fairly often in our kitchens and less in the bathrooms. Nevertheless, they have the ability to “overwelm” an apartment and spread to all places where there is food, moisture and no protection measures. They can create a huge problem and health risk in cafe-bars and restaurants.
They are effectively treated with gel products. In recent years, the market has been flooded by such drugs though only a few have the ability to operate through Trophallaxis.
Trophallaxis is the mutual feeding among the individuals of a colony and consists of exchanging their bowel contents, swallowing the materials while grooming or cleaning one another, or feeding of their shed skins.
The cleanliness of the area is an important factor in the result.