caa a22 4500 477073433 CHVBK 20180405111432.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF02893294 doi (NATIONALLICENCE)springer-10.1007/BF02893294 Schroeder L. Department of Entomology, Swedish University of Agricultural Sciences, 750 07, Uppsala, Sweden aut Interactions between the predators thanasimus formicarius (Col.: Cleridae) and rhizophagus depressus (Col: Rhizophagidae), and the bark beetle tomicus Piniperda (Col.: Scolytidae) [Elektronische Daten] [L. Schroeder] The occurrences of Thanasimus formicarius (L.) (Cleridae), Rhizophagus depressus (F.) (Rhizophagidae), and Epuraea marseuli Reitter (Nitidulidae) in cut Scots pines, Pinus sylvestris L., attacked by Tomicus piniperda (L.) (Col.: Scolytidae) were recorded in the field, and interactions between the species were studied in caged pine bolts attacked by T. piniperda. T. formicarius eggs and R. depressus adults were abundant in the T. piniperda attacked trees, whereas only a few individuals of E. marseuli were found. T. formicarius and R. depressus, but not E. marseuli, reproduced in the caged bolts. T. piniperda offspring production per unit area of bark was reduced by 41% when reared with R. depressus, by 81% when reared with T. formicarius, and by 89% when all three species were reared together, compared with T. piniperda alone. The interaction between T. formicarius and R. depressus was mutually antagonistic. When both species were present in the same bolt the total number of larvae was reduced by 49% for R. depressus and the number of large larvae (length > 10 mm) was reduced by 35% for T. formicarius compared with their respective production values when each species was present alone with the bark beetle. There was a positive relationship between T. piniperda egg gallery density and the production of R. depressus larvae per m2. Larvae of both R. depressus and T. formicarius developed into new adults during the first summer. Lavoisier Abonnements, 1996 Epuraea marseuli nationallicence Nitidulidae nationallicence bark beetle predators nationallicence biologicalcontrol nationallicence Entomophaga Springer Netherlands 41/1(1996-03-01), 63-75 0013-8959 41:1<63 1996 41 10526 https://doi.org/10.1007/BF02893294 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02893294 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Schroeder L. Department of Entomology, Swedish University of Agricultural Sciences, 750 07, Uppsala, Sweden aut NATIONALLICENCE 773 0- Entomophaga Springer Netherlands 41/1(1996-03-01), 63-75 0013-8959 41:1<63 1996 41 10526 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer