These are boric acid dumplings which are very effectin in cockroal measure. Boric acid dumpling is a cockroach measures to be used for a long time in Japan . It's cockroach attractant insecticide. Special attraction jam steadily attract the cockroaches to the poison. They will eat more and more since they are their favoite onion and semame seed soft dumpling shaped jagged cut structure to be bitten easily.
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