Winter mortality in sub‐corticolous populations of Ips typographus (Coleoptera, Scolytidae) and its parasitoids in the south‐eastern Alps
Author:
- 1 June 2002
- journal article
- Published by Wiley in Anzeiger für Schädlingskunde
- Vol. 75 (3) , 62-68
Abstract
A study concerning the winter mortality of a sub‐corticolous population of Ips typographus and its parasitoids has been carried out in the south‐eastern Alps (Italy) during the winter 1997/98. Three attacked spruce trees were sampled three times (November, February and April) by collecting infested bark disks (1 dm2 each). All insects that emerged from the bark or died in the samples before emergence were counted. The mean number of living Ips typographus occurring under the bark decreases by 49 % from November to April. Winter mortality mainly affects larval stages and young adults. The same trend was observed for the parasitoids Coeloides bostrychorum (48.5 %) and Roptrocerus xylophagorum (47.5 %).Keywords
This publication has 28 references indexed in Scilit:
- A sampling technique to estimate within‐tree populations of pre‐emergent Ips typographus (Col., Scolytidae)Journal of Applied Entomology, 1996
- Overwintering mortality of Ips grandicollis Eichh. (Col., Scolytidae) and its parasitoid, Roptrocerus xylophagorum Ratz. (Hym., Pteromalidae), in South AustraliaJournal of Applied Entomology, 1993
- Observations on the biology of three parasitoids of the spruce bark beetle, Ips typographus (Col., Scolytidae): Coeloides bostrychorum, Dendrosoter middendorffii (Hym., Braconidae) and Rhopalicus tutela (Hym., Pteromalidae)Journal of Applied Entomology, 1990
- On the longevity of Ips typographus L. adultsJournal of Applied Entomology, 1986
- Begleitinsekten in Buchdrucker-Pheromonfallen in SüdtirolJournal of Pest Science, 1985
- The effect of attack density on size, fat content and emergence of the spruce bark beetleIps typographusL.1Zeitschrift für Angewandte Entomologie, 1983
- Zur überwinterung des Buchdruckers, Ips typographus (L.), in der Bodenstreu (Col., Scolytidae)Zeitschrift für Angewandte Entomologie, 1977
- On factors affecting the size, fat content and behavior of a scolytid1Zeitschrift für Angewandte Entomologie, 1975
- THE EFFECT OF REARING TEMPERATURE ON THE SIZE AND FAT CONTENT OF THE DOUGLAS-FIR BEETLEThe Canadian Entomologist, 1967
- The Bark Beetle Complex Associated with Lodgepole Pine Slash in Alberta: Part II—Notes on the Biologies of Several Hymenopterous ParasitesThe Canadian Entomologist, 1957