Please wait, while we are loading the content...
Please wait, while we are loading the content...
| Content Provider | Springer Nature Link |
|---|---|
| Author | Lobinger, Gabriela Feicht, Elfriede |
| Copyright Year | 1999 |
| Abstract | During a mass propagation ofPityogenes chalcographus in Southern Bavaria the pteromalid waspKarpinskiella pityophthori Bouček, a parasitoid of the bark beetle which is not very well known, occurred in increased density. The wasps were attracted by the pheromone lure “Chalcoprax” which has kairomonal effect uponK. pityophthori. Investigations with the aid of pheromone baited traps and a new electronical instrument produced detailed knowledge about swarming behaviour and population density of this bark beetle antagonist. A high degree of correspondence between the pteromalid wasp andP. chalcographus could be shown concerning pheromone mediated activity, environmental thresholds and abundance dynamic. While parasitoids are not presumed to have considerable regulative potency during mass propagations of bark beetles, we found from investigations in laboratory and in the field thatK. pityophthori showed high productivity and parasitizing effectivity and so had significant influence on the density ofP. chalcographus. This effectivity was additionally increased by the fact that in the gradation area the population density of the wasp considerably adapted to the abundancy of the local bark beetle populations forming so-called “spot populations”. Because of this concentration of parasitoids in the areas of high bark beetle density we had high numbers of trapped wasps at the culmination point of the bark beetle propagation, which makes an extensive use of pheromone traps for monitoring or control ofP. chalcographus ecologically dubious.Im Rahmen einer Massenvermehrung des Kupferstechers in Südbayern tratKarpinskiella pityophthori, eine wenig bekannte imaginalparasitische Schlupfwespe (ÜFam. Erzwespen) beiP. chalcographus, in erhöhter Dichte auf. Der Nachweis erfolgte mit dem Kupferstecherlockstoff “Chalcoprax”, der auf die Erzwespe Kairomonwirkung ausübt. Untersuchungen mit Hilfe von Pheromonfallen und einem neuartigen elektronischen Meßgerät erbrachten detaillierte Kenntnisse über Schwärmverhalten und Dichteentwicklung dieses Borkenkäferantagonisten. Es zeigte sich eine hohe Übereinstimmung in pheromongesteuerter Aktivität, Umweltansprüchen und Abundanzentwicklung bei Erzwespe und Kupferstecher. Obwohl im allgemeinen den Parasitoiden bei Borkenkäfermassenvermehrungen keine nennenswerte Regulationswirkung zugesprochen wird, zeigte sich anhand von Laborazuchten sowie Freilanduntersuchungen, daßK. pityophthori aufgrund seiner hohen Vermehrungs- und Parasitierungsleistung erheblichen Einfluß auf die Dichteentwicklung des Kupferstechers im Kalamitätsgebiet hatte. Diese Effektivität wurde noch gesteigert durch die Tatsache, daß sich im Gradationsgebiet die Erzwespendichte sehr stark an die Abundanz lokaler Kupferstecherpopulationen anpaßte (Bildung von “Spot populations” mit eigener Dynamik). Aufgrund dieser Konzentrierung der Schlupfwespe in Bereichen hoher Borkenkäferdichte kam es am Höhepunkt der Gradation zu sehr hohen Fangzahlen des Parasitoiden, was erhebliche Bedenken gegen einen größerflächigen Einsatz von Pheromonfallen zum Zwecke der Prognose oder Bekämpfung aufwirft. |
| Starting Page | 65 |
| Ending Page | 71 |
| Page Count | 7 |
| File Format | |
| ISSN | 14365693 |
| Journal | Journal of Pest Science |
| Volume Number | 72 |
| Issue Number | 3 |
| e-ISSN | 14390280 |
| Language | German |
| Publisher | Springer-Verlag |
| Publisher Date | 1999-01-01 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | Subscribed |
| Subject Keyword | Agriculture Plant Pathology Plant Sciences Ecology Forestry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Insect Science |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|