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Porphyrosela alternata : ウィキペディア英語版 | Porphyrosela alternata
''Porphyrosela alternata'' is a moth of the Gracillariidae family. It is known from Japan (Kyūshū), Malaysia (Pahang, Selangor), Nepal and Taiwan.〔(Global Taxonomic Database of Gracillariidae (Lepidoptera) )〕 This species is a well-known pest of cotton. The wingspan is 2.6-4.3 mm. The larvae feed on ''Desmodium'' species, including ''Desmodium heterocarpon'', ''Desmodium heterophyllum'' and ''Desmodium strigillosum''. They mine the leaves of their host plant. The mine has the form of an irregular linear-blotch-mine occurring upon the upper side of the leaflet; it is usually started as a linear, flat type, then suddenly widened into a blotch, nearly occupying the whole surface of a small leaflet. The mining part is whitish-green with an irregular brownish line of frass at young stage, and discoloured into brownish at mature stage. When completed, the upper epidermis on the blotch-part is strongly contracted with silken threads to form an upward-folded leaflet. The larvae are often gregarious. ==References==
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