Monitoring of sawfl y ( Hymenoptera: Tenthredinidae Hymenoptera: Tenthredinidae ) infestation on spruce

J. Holuša and O. Holuša
Additional contact information
J. Holuša: Forestry and Game Management Research Institute, Jíloviště-Strnady, Office Frýdek-Místek, Czech Republic
O. Holuša: Forestry and Game Management Research Institute, Jíloviště-Strnady, Office Frýdek-Místek, Czech Republic

Journal of Forest Science, 2002, vol. 48, issue 5, 219-224

Abstract: A new method for evaluating damage caused by tenthredinids to Norway spruce stands is based on defoliation of the top whorls. A scale with four classes of defoliation was established that is easy to use. Defoliation can be displayed graphically on a grid map (Central European system), in which the map fi elds are delimited by parallels of latitude (6 by 6 minutes) and meridians (10 by 10 minutes) with an approximate size of 11.2 × 12.0 km. The degree of defoliation for an entire forest can be marked by circles of different size in the map field. The range and intensity of an infestation, and the change in defoliation from year to year are easily seen.

Keywords: spruce tenthredinids; evaluation of infestation; grid mapping system; Czech Republic (search for similar items in EconPapers)
Date: 2002
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://jfs.agriculturejournals.cz/doi/10.17221/11877-JFS.html (text/html)
http://jfs.agriculturejournals.cz/doi/10.17221/11877-JFS.pdf (application/pdf)
free of charge

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:caa:jnljfs:v:48:y:2002:i:5:id:11877-jfs

DOI: 10.17221/11877-JFS

Access Statistics for this article

Journal of Forest Science is currently edited by Mgr. Ilona Procházková

More articles in Journal of Forest Science from Czech Academy of Agricultural Sciences
Bibliographic data for series maintained by Ivo Andrle ().