Abstract
An infestation on fruit-body of Hypsizigus marmoreus by a fungus gnat pest, Lycoriella ingenua (Dufour, 1839) (Diptera: Sciaridae), is reported from Japan for the first time. Sciarid larvae inhabited inside and outside of the sporophore of H. marmoreus. The adults reared from larvae infesting them are identified as L. ingenua based on the morphological features. Additional localities of L. ingenua were recorded from 12 indoor facilities of saw-dust media of Lentinula edodes in six prefectures, Japan. Morphological features distinguishing it from a major fungus gnat pest of agricultural products in Japan, Bradysia impatiens (Johannsen, 1912), are described. Control measures of this pest species proposed in foreign countries are reviewed and biocontrol using nematodes as its natural enemies together with other physical and cultural controls for this pest species are discussed.
