Abstract
The maize orange leafhopper Cicadulina bipunctata (Melichar) is an insect pest of cereal crops in tropical and subtropical regions of the Old World. This leafhopper induces gall symptoms characterized by stunted growth and swollen leaf veins on various Poaceae. Damage by C. bipunctata has been reported from Australia, the Philippines, China, Taiwan, and Japan. In Japan, C. bipunctata occurs in the central and southern parts of Kyushu. Because the leafhopper is a potential pest of various cereal crops, we conducted field surveys in Shikoku and the southern part of the Kii Peninsula (a part of Honshu), where the climate seems to be suitable for the establishment of C. bipunctata. As a result, we found C. bipunctata at some localities in Ehime and Kochi Prefectures. This is the first record of this leafhopper from Shikoku. Our laboratory experiment revealed that a Kochi population of C. bipunctata had a gall inducing ability similar to the Kumamoto population. More attention should be paid to assessing the risk of further expansion of C. bipunctata populations in Shikoku.
Highlights
Maize orange leafhopper, Cicadulina bipunctata (Melichar), is distributed in tropical and subtropical regions of the Old World (Webb 1987; Matsukura et al 2009a)
Because the leafhopper is a potential pest of various cereal crops, we conducted field surveys in Shikoku and the southern part of the Kii Peninsula, where the climate seems to be suitable for the establishment of C. bipunctata
Cicadulina bipunctata is a serious pest of maize because feeding by the leafhopper induces gall symptoms characterized by stunted growth and swollen leaf veins, which is referred to as the maize wallaby ear symptom (Grylls 1975; Ohata 1993)
Summary
Cicadulina bipunctata (Melichar), is distributed in tropical and subtropical regions of the Old World (Webb 1987; Matsukura et al 2009a). The symptoms have been reported from Australia (Grylls 1975), the Philippines (Agati and Calica 1949; Maramorosch et al 1961), China (Li and Liu 2004; Li et al 2004), Taiwan (Chen 1991), and Japan (Ohata 1993; Matsumura et al 2005, 2006).
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