Toumeyella parvicornis
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Author(s): William M. Ciesla, Forest Health Management International
Source: IPM Images
Author(s): Jill O'Donnell, MSU Extension
Source: IPM Images
Toumeyella parvicornis (Cockerell, 1897) - (pine tortoise scale)
This soft scale can cause serious infestations on pine trees in North- and Central America. It is regarded as a quarantine risk to European countries (Marinova-Todorova et al., 2020) and has been already recorded since 2014 from Italy (Garonna et al., 2015). It apparently has the ability to adapt to different environments and climates. While it has been first described from Florida, it is also found in Canada as well as in tropical parts of Central America.
Several Pinus species are attacked and the scale infests mainly the young growing shoots of the host tree. The growth is reduced and infestations can lead to tree mortality. In the Turks and Caicos Islands severe outbreaks developed in the early 2000s on Pinus caribaea, causing dieback and widespread mortality in the whole territory (Malumphy et al., 2012).
T. parvicornis has a bark form and a leaf form. It can be distinguished from other Toumeyella species by morphological characters like the dorsal bilocular pore clusters present on the adult female.
