Asterodiaspis variolosa (Ratzeburg, 1870)

golden oak scale

on Quercus

Asterodiaspis variolosa: scales on Quercus kelloggii

Quercus kelloggii, USA, California, Ross © United States National Collection of Scale Insects Photographs Archive, USDA Agricultural Research Service, Bugwood.org

gall

Scales on the branches. Around each individual scale a low ride develops; heavily infested branches become knobby and malformed; also bark cracks may develop. Mainly found at the tip of the branches.

hostplants

Fagaceae, monophagous

Quercus coccifera, ilex, lusitanica, palustris, petraea, pubescens, robur, rubra.

synonyms

Asterolecanium variolosum.

gall

only a microscopical examination allows separation from A. minor and A. quercicola; all three species may occur on the same tree.

references

Béguinot (2000b), Buhr (1965a), Dauphin & Aniotsbehere (1997a), Gertsson (2016a), Gill (1993a), Gomez-Menor Ortega (1960a), Hellrigl (2004a), Jansen (1999b, 2013a), Koops (2013a), Kozár, Guignard, Bachmann ao (1994a), Malumphy (2009a, 2010a), Malumphy & Ostrauskas (2009a), Malumphy, Ostrauskas & Pye (2008a, 2010a), Malumphy & Kahrer (2011a), Masten Milek, Seljak, Šimala ao (2016a), Redfern & Shirley (2011a), Roskam (2009a), Seljak (2010a), ScaleNet, Spodek, Ben-Dov & Mendel (2013a), Williams (2010a).

mod 17.xi.2019