Rice leaf roll moth - Marasmia exigua

Japanese: イネタテハマキ(稲縦葉巻) - イネタテハマキ（英語表記）Marasmia exigua

An insect of the Lepidoptera, Pyralidae family. Also known as the rice leaf moth. A small moth with a span of about 1cm. The leading edge of the forewings and the outer edges of both wings are black-brown. The rest of the moth is yellowish brown. The larvae roll up rice leaves and feed from the inside. They are widely distributed from the Kanto region westward, and are mainly found in paddy fields. They occur three times a year, and if they occur frequently during the autumn heading period, the damage becomes greater. The rice leaf moth, Cnaphalocrocis medinalis , which is similar to this species, is also well known as a pest of grasses, but the leaves that the larvae roll up are not as regularly arranged as this species.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

鱗翅目メイガ科の昆虫。別名イネハカジノメイガ。小型のガで，開張1cm内外。前翅前縁部と両翅外縁部は黒褐色。ほかは黄褐色。幼虫はイネの葉を巻いて中から食害する。関東地方より西に広く分布し，おもに水田地帯に産する。年3回の発生で，秋の出穂期に多発すると被害は大きくなる。本種と似ているコブノメイガCnaphalocrocis medinalisもイネ科植物の害虫としてよく知られているが，幼虫のつづった葉が本種のように規則正しくない。

出典　株式会社平凡社世界大百科事典第２版について　情報

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