Effect of Low Temperature on the Termination of Photoperiodic and Food-Mediated Diapause in the Cabbage Bug, Eurydema rugosa MOTSCHULSKY (Heteroptera: Pentatomidae)

In Eurydema rugosa, adult diapause was induced under short-day conditions, with rape seeds or leaves as food, or under long-day conditions with rape seeds as food. Exposure to low temperature or long-day conditions with leaves terminated the diapause induced by short-day conditions with leaves. The diapause induced under short-day conditions on seeds can be also terminated by exposure to a low temperature. However, these treatments did not terminate the diapause induced by feeding on seeds under long-day conditions. The diapause induced under short-day conditions is suggested to be terminated by the low temperatures during winter nuder natural conditions.