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American cockroaches, Periplaneta americana (L.), left undisturbed, often develop to enormous numbers and become major pests in sanitary sewers throughout much of the world. They are also domiciliary pests in many places, especially in southeast Asia. Moving from sewers, they often invade surroundin...

Barrier applications of sprays and granules have been widely used to control Argentine ants, Linepithema humile (Mayr), around structures. Their activity against ants, especially the pyrethroids, has been ascribed to toxicity and repellency. Recent studies have shown that bifenthrin and cyfluthrin p...