Eurytoma serratulae and E. robusta (Hymenoptera, Eurytomidae): complementary host exploitation strategies of coexisting parasitoids and their impact on the host Urophora cardui

Autor: Helmut Zwölfer, Marc Böheim, Erwin Beck

Publikováno v: Journal of Hymenoptera Research, Vol 42, Pp 47-62 (2015)

Our study investigates the host exploitation strategies of Eurytoma serratulae and E. robusta (Chalcidoidea, Eurytomidae), two parasitoid species that co-occur in gall populations of the tephritid Urophora cardui on Cirsium spp. The endoparasitoid E.

Externí odkaz: https://doaj.org/article/9a05b130d33249bfb3924c297e7c7a4c

Plant diversity has contrasting effects on herbivore and parasitoid abundance in Centaurea jacea flower heads

Autor: Wolfgang W. Weisser, Stefan Schmidt, Sylvia Creutzburg, Norma Nitschke, Lysett Wagner, Helmut Zwölfer, Eric Allan, Hannes Baur

Publikováno v: Ecology and Evolution
Nitschke, Norma; Allan, Eric; Zwölfer, Helmut; Wagner, Lysett; Creutzburg, Sylvia; Baur, Hannes; Schmidt, Stefan; Weisser, Wolfgang W. (2017). Plant diversity has contrasting effects on herbivore and parasitoid abundance in Centaurea jacea flower heads. Ecology and evolution, 7(22), pp. 9319-9332. John Wiley & Sons, Inc. 10.1002/ece3.3142

High biodiversity is known to increase many ecosystem functions, but studies investigating biodiversity effects have more rarely looked at multi‐trophic interactions. We studied a tri‐trophic system composed of Centaurea jacea (brown knapweed), i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d81e3981e2035ab842faf40543cdb13b
http://europepmc.org/articles/PMC5696411

Zur Kenntnis der Parasiten des Tannentriebwicklers

Autor: Helmut Zwölfer

Publikováno v: Zeitschrift für Angewandte Entomologie. 39:387-409

Summary During collections of parasites of the European Fir Budworm Choristoneura murinana Hb., carried out in 1955 in the Vosges, 23 parasite species had been reared, 7 of them being first records for C. murinana Hb. The degree of larval parasitism

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c7086a9deaaf80ca8042f8111156ab3c
https://doi.org/10.1111/j.1439-0418.1956.tb01261.x

The Predator Complex of the White-Fir Woolly Aphids (Genus Dreyfusia, Adelgidae)

Autor: Helmut Zwölfer, Hubert Pschorn-Walcher

Publikováno v: Zeitschrift für Angewandte Entomologie. 39:63-75

Summary The white fir woolly aphids of Europe are provisionally divided into: 1 a) Dreyfusia piceae form typica, an euryoekous (i. e. - with wide ecological tolerances), obligatory multivoltine form, living on the trunks of Abies pectinata (= alba),

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d959a408002fd85037f2a9bb10e6240b
https://doi.org/10.1111/j.1439-0418.1956.tb01243.x

Eurytoma serratulae and E. robusta (Hymenoptera, Eurytomidae): complementary host exploitation strategies of coexisting parasitoids and their impact on the host Urophora cardui

Autor: Marc Böheim, Helmut Zwölfer, Erwin Beck

Publikováno v: Journal of Hymenoptera Research, Vol 42, Pp 47-62 (2015)
Journal of Hymenoptera Research 42: 47-62

Our study investigates the host exploitation strategies of Eurytoma serratulae and E. robusta (Chalcidoidea, Eurytomidae), two parasitoid species that co-occur in gall populations of the tephritid Urophora cardui on Cirsium spp. The endoparasitoid E.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dee97a41da1b9f59b68d4fd17ac6aace
https://zenodo.org/record/575056