Gilletteella coweni (Gillette, 1907)

on Pseudotsuga

parasite

This species is closely related with G. cooleyi. The main difference is that while cooleyi in principle passes through a host alternation, coweni does not alternate.

hostplants

Pinaceae, monophagous

Pseudotsuga menziesii.

distribution within Europe

(PESI, 2018).

synonyms

Adelges coweni.

notes

Originally a species from California; introduced in Italy, and a serious pest there.

references

Barbagallo, Binazzi, Pennacchio & Pollini (2011a), Barbagallo & Pollini (2014a), Blackman & Eastop (2018), Carter (1971a), Covassi & Binazzi (1981a), Hellrigl (2004a).

mod 4.iv.2018