Hibernating sites for stink bugs that diapause in adult stage

Abstract

To clarify the sites that are used for hibernation by stink bugs that diapause in the adult stage, we attempted to search for diapausing adults in the scrubs and levees beside paddy fields during winter. The adults of Plautia crossota stali and Glaucias subpunctatus, which cause serious damage to many kinds of fruit, hibernated under the fallen leaves in the scrubs. Similarly, the adults of Cletus punctiger and Leptocorisa chinensis, which are insect pests that feed on rice grains, and Riptortus pedestris and Piezodorus hybneri, which are soybean pests, hibernated under the fallen leaves in the scrubs or at the bottom of the stocks of dead gramineous plants in the levees beside the paddy fields. The hibernating sites of Lagynotomus elongatus adults, which are pests of rice plants, were not investigated in detail. However, we found diapausing adults at the bottom of the stocks of dead gramineous plants in the levees beside the paddy fields or in the dead grasses in the sunny scrubs.