Valid Names Results

Lepidosaphes yanagicola Kuwana, 1925 (Diaspididae: Lepidosaphes)

Nomenclatural History

• Lepidosaphes yanagicola Kuwana 1925a: 19-21. Type data: JAPAN: Honshu, Saitama, on Salix sp., by S. Kuwana. Syntypes, female, Type depository: Ibaraki-ken: Insect Taxonomy Laboratory, National Institute of Agricultural Environmental Sciences, Kannon-dai, Yatabe, Tsukuba-shi, (Kuwana), Japan; accepted valid name Illustr.
• Lepidosaphes yanogicola Kuwana, 1925; Borchsenius 1937a: 187. misspelling of species epithet
• Lepidosaphes atunicola Siraiwa 1939: 69. Type data: RUSSIA: Sakhalin, Honto, on Ulmus laciniata. Syntypes, female, junior synonym (discovered by Takagi1960, 76). Notes: Types presumed lost. Illustr.
• Insulaspis yanagicola (Kuwana, 1925); Borchsenius 1963: 1173. change of combination
• Lepidosaphes (Insulaspis) yanagicola Kuwana, 1925; Danzig 1980b: 304. change of combination
• Mytilaspis yanagicola (Kuwana, 1925); Tang 1986: 277. change of combination

Common Names

• euonymus alatus scale Stimme1983
• firebush scale MillerDa1990
• Primorye scale Danzig1980b
• yanagicola oystershell scale Koszta1996
• yanagicola scale LambdiWa1980

Ecological Associates

Hosts:

Families: 14 | Genera: 21

Foes:

Families: 1 | Genera: 1

Geographic Distribution

Keys

• MillerDa2005: pp.29-32 ( Adult (F) ) [Field Key to Economic Armored Scales]
• MillerDa2005: pp.20-22 ( Adult (F) ) [Armored Scales]
• Koszta1996: pp.518 ( Adult (F) ) [Key to species of Northeastern North American Lepidosaphes]
• Danzig1993: pp.247 ( Adult (F) ) [Key to species of Lepidosaphes]
• Danzig1986a: pp.356 ( Adult (F) ) [Key to species of Lepidosaphes] Key as: Lepidosaphes (Insulaspis) yanagicola
• Chou1982: pp.156 ( Adult (F) ) [Key to Chinese species of Lepidosaphes]
• Paik1978: pp.336 ( Adult (F) ) [Key to species of Lepidosaphes]
• Takagi1960: pp.91 ( Adult (F) ) [Key to species of Lepidosaphes]
• Takaha1955e: pp.70 ( Adult (F) ) [Key to species of Lepidosaphes]
• Borchs1938: pp.138 ( Adult (F) ) [Key to species of Lepidosaphes in the Fareastern Region of the SSSR]
• Kuwana1925a: pp.4 ( Adult (F) ) [Key to species of Lepidosaphes]

Remarks

• Systematics: Lepidosaphes yanagicola is extremely close to L. corni. It is distinguished by the pygidium which is not trapezoidal like the latter, but is rounded along its free margin. In L. corni there is always a submarginal dorsal duct in front of the 2nd lobe (Takagi, 1960).
• Structure: Female scale elongate, gradually widening posteriorly, convex, brown, with grayish margins. Exuviae orange-yellow. Ventral scale divided. Male scale small, same color as female, slightly wider towards the posterior end, 1 mm long (Kuwana, 1925a). Adult female elongate, broadest across 2nd or 3rd abdominal segment, 1.29 mm long and 0.60 mm wide; free abdominal segments each, but weakly produced laterally; pygidium more or less rounded along its free margin (Takagi, 1960).
• Biology: L. yanagicola has one annual generation in Pennsylvania. Fertilized adult females overwinter and begin to oviposit in mid-June. They produce eggs for nearly a month and for this reason all stages can be found from late July into August. By the time cold fall weather arrives, all have matured and mated, the males have died and only fertilized females remain (Stimmel, 1983). Porter et al. (1959) reported that in Ohio females overwinter and produce eggs from early June into July. Crawlers appear by June 20 and all stages are present after late July. McComb and Davidson (1969) reported crawlers in June in Maryland. (Miller & Davidson, 2005).
• Economic Importance: Miller & Davidson (1990) list this insect as a pest. The authors have observed heavy infestations of fire bush scale causing premature leaf drop and die back of the host in Beltsville, Maryland. According to Kosztarab (1963) several cases of heavy infestations and damage have been reported in Ohio nurseries. Kosztarab (1996) indicated that damage can be caused with premature leaf drop and twig dieback in nurseries in the northeastern U.S. on winged euonymus. Stimmel (2002, personal communication) indicated that although this scale builds to heavy populations in Pennsylvania, it rarely causes damage to firebush. Miller and Davidson (1990) consider this species to be an occasional pest. (Miller & Davidson, 2005).
• General Remarks: Detailed description and illustration by Takagi (1960).

Illustrations

Citations