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Although there are few cockroaches in newly built or insecticide-treated buildings or houses, they enter from outside, increase in number and spread out widely as time goes by. To elucidate how German cockroaches distribute widely in such places, we previously investigated their horizontal movement ...

Tunnel construction by Coptotermes formosanus Shiraki is initially random, with tunnels radiating outward in a uniform circular distribution from the point of origin. The degree of branching of these tunnels may be species- specific, and reflect the pattern of occurrence of food resources in differe...

The use of baits for the control of cockroaches in homes is now commonplace. To date, most bait studies have focused on the German cockroach, Blattella germanica (L). However, in many parts of the world, especially the tropics, the American cockroach,Periplaneta americana(L), is a more common pest. ...

Four simulated domestic environments were each infested with mixed populations (3,300 insects) of German cockroaches (Blattella germanica). The simulated domestic environments (containers) were maintained at 25°C and 45% r.h. and cockroaches were fed and watered ad lib. After an acclimation period o...

The ability of mobile stages of oriental cockroaches to survive at -5C increased with acclimation at 10°C. Fully acclimated insects had LT5Os (time) of 1.3 - 4.1 days, depending on stage. A minimum of 8 days at - 5°C or 1 days at - 10°C was required to kill all stages; insects could survive for more...

Two mixed-age (semi-natural) populations of the Oriental cockroach Blatta orientalis were established in identical artificial domestic environments contained in steel freight containers. Each population was allowed a 10 week period of acclimation, during which the populations were monitored using Ro...