Entomophaga (1996) 41, 63-75
L.M. Schroeder (1996)
Interactions between the predators Thanasimus formicarius (Col.: Cleridae) and Rhizophagus depressus (Col.: Rhizophagidae), and the bark beetle Tomicus piniperda (Col.: Scolytidae)
Entomophaga 41 (1), 63-75
Abstract: 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.
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Link to article at publishers website
Database assignments for author(s): Leif Martin Schroeder
Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution
environment/habitat manipulation
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
|---|---|---|---|---|
| Tomicus piniperda | Pine (Pinus) | Sweden | ||
| Thanasimus formicarius (predator) | Tomicus piniperda | Pine (Pinus) | Sweden | |
| Rhizophagus depressus (predator) | Tomicus piniperda | Pine (Pinus) | Sweden |
