To do this, you need to make small long strips of boric acid near the places of concentration of cockroaches: near the toilet, sink, plinth, in the dark corners of the apartment.
Ukuze wenze lokhu, kumelwe wenze emapheshana encane eside boric acid eduze nezindawo lokuhlushwa amaphela: eduze yangasese, ukucwila, skirting, ezisemagumbini emnyama efulethini.