Plant Parasites of Europe

leafminers, galls and fungi

Plagiotrochus amenti

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.

host plants

Fagaceae, monophagous

Quercus suber.

on Quercus, sexual generation

Plagiotrochus amenti: catkin gall on Quercus suber

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.


Fagaceae, monophagous

Quercus suber.


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.


Ceroptres cerri; Saphonecrus lusitanicus.

parasitoids, predators

Mesopolobus lichtensteini, mediterraneus, tibialis; Ormocerus latus.


Cerasa (2015a), Cerasa, lo Verde & Massa (2014a), Dauphin & Aniotsbehere (1997a), Garbin, Díaz & Pujade-Villar (2008a), Gómez, Hernández Nieves, Garrido Torres, ao (2006a), 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).

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