Extermination of Ship's Cockroach using Bait Medicine

Abstract

Various harmful insects exist in the land facilities and houses. An investigation research is widely done about the harmful insects. And an insecticide against them is variously developed, and a report about their effect is done. Harmful insects exist in a ship as well as on the land. However, a research report regarding them is a few. In Nagasaki University, we are getting rid of harmful insects in the training ship Kakuyo-maru in June or July every year. However, approximately 3 months later, an inhabitation number of a cockroach returned as it was before. Because 20 years elapsed after the Kakuyo-maru constructed, it offered a cochroach comfortable trace to exist in the ship. Then, we have executed a biannual cockroach extermination using bait medicine from 1997. We continue a state that there is hardly any cockroaches, i. e. cockroach index is less than 0.1 through the year. Consequently, it is thought that the using of bait medicine indicates a persistent effectively in a ship.