九州東岸および北部におけるフタテンチビヨコバイの分布状況

Abstract

Maize orange leafhopper Cicadulina bipunctata is distributed widely in tropical and subtropical regions of the Old World and feeds on various Poaceae. This species induces maize wallaby ear symptom, which is characterized by stunted growth and swelling of leaf veins. In Japan, damage by the leafhopper to young seedlings of the second forage maize crop was reported from Kumamoto Prefecture in the late 1980s. Because C. bipunctata is a potential pest of various cereal crops and the damage might become more severe due to global warming, we investigated the distribution of C. bipunctata in northern Kyushu and eastern parts of central Kyushu where an intensive survey has not yet been conducted. As a result, we newly collected the leafhopper from Oita Prefecture and clarified its wide distribution in eastern parts of central Kyushu. The leafhopper was not found in northern Kyushu including northern parts of Oita and Fukuoka Prefectures. This result indicates that the leafhopper is broadly distributed in lowland areas of central and southern Kyushu. Attention should be paid to a potential risk of damage by this leafhopper to various cereal crops in these areas.