Plagiotrochus amenti Kieffer, 1901
on Quercus, agamnous generation
Larvae solitary in 1 x 3 mm large elliptic cells in 2-3 years old branches; only during mass occurrences some swelling does occur, and the galls can be found only by looking for exit holes. Pupation within the gall; the galls may be vacated in the second or third year.
on Quercus, sexual generation
Quercus suber, catkin gall (from Houard, 1908a)
gall chamber of 0.7 x 2 mm under the bark of one year old twigs or in the swollen axis of catkins, rarely in a petiole or thick vein. Infested parts of the plants are slightly swollen or contorted. The adult wasps emerge early in the summer.
Plagiotrochus suberi Weld, 1926.
It is not clear what is intended by “Plagriotrocgus amenti Tav.” in Tavares (1905a: 57, living op Quercus suber.
the species is a threat for the cork production.
Cerasa (2015a), Cerasa, lo Verde & Massa (2014a), Dauphin & Aniotsbehere (1997a), Garbin, Díaz & Pujade-Villar (2008a), Houard (1908a), Kwast (2014a), Nieves-Aldrey (1981a, 2001a), Nieves-Aldrey, Gómez, Hernández Nieves & Lobo (2006a), Pujade-Villar, Garbin, Paretas-Martínez & Díaz (2008a), Pujade-Villar, Grami & Ben Jamâa (2010a), Pujade, Villemant & Andreï-Ruiz (2000a).