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Dispersal of the thistle gallfly Urophora cardui and its endoparasitoid Eurytoma serraiulae (Hymenoptera: Eurytomidae)
Author(s) -
SCHLUMPRECHT HELMUT
Publication year - 1989
Publication title -
ecological entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.865
H-Index - 81
eISSN - 1365-2311
pISSN - 0307-6946
DOI - 10.1111/j.1365-2311.1989.tb00963.x
Subject(s) - biology , tephritidae , biological dispersal , parasitoid , botany , hymenoptera , ecology , zoology , population , pest analysis , demography , sociology
. 1. The dispersal of the gall‐forming tephritid Urophora cardui L. (Diptera: Tephritidae) and its endoparasitoid Eurytoma serratulae Latr. (Hymenoptera: Eurytomidae) from an experimental colony were investigated over a period of 4 years. 2. The dispersal rate for both fly and endoparasitoid was one to two magnitudes higher than in previous studies, which found 100 m per generation maximally. The dispersal rate of the endoparasitoid was not less than that of its host. Most newly founded colonies were small and had high extinction rates. 3. The viability of colonies of U. cardui did not correlate with the distance from the dispersal centre. 4. The dispersal rates observed are high enough to allow a multiple spread and extinction in mid‐Europe in the post‐pleistocene period.