Articles
Vol. 42 No. 2 (2010)
https://doi.org/10.4081/jear.2010.81

On the spatial spread of the Rice Water Weevil, Lissorhoptrus oryzophilus Kuschel (Coleoptera: Erirhinidae), in Italy

Publisher's note
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.
Received: 2 February 2012
Published: 26 July 2010
2042
Views
1846
Downloads
Italian rice growing areas, settlement, new records, expansion radius.

Authors

Daniela Lupi
daniela.lupi@unimi.it
DiPSA Università degli Studi di Milano, Italy.
Mario Colombo
DiPSA Università degli Studi di Milano, Italy.
Maria Luisa Giudici
Ente Nazionale Risi - Centro Ricerche sul Riso, Italy.
Bruno Villa
Ente Nazionale Risi - Centro Ricerche sul Riso, Italy.
Cesare Cenghialta
Ente Nazionale Risi - Centro Ricerche sul Riso, Italy.
Daniele Passoni
Politecnico di Milano, DIIAR-Sez. Rilevamento, Italy.
A five year study has been made to establish the spread of the rice water weevil Lissorhoptrus oryzophilus (Coleoptera: Erirhinidae) in Northern Italy. Data obtained with GPS from 2005 throughout 2009 were first georeferenced with SW ArcGis® 9.2, then overlapped and compared to the map of the European environmental landscape based on the interpretation of satellite images (CORINE Land Cover map) and to the hydrographic chart CT10 (Technical Regional map 10000). The analysis of the radial rate of spread per year indicates a deceleration in the expansion from 10.864 ± 6.801 km/year in 2005 to 5.318 ± 1.401 km/year in 2009. In five years the weevil has expanded its distribution in nearly all rice paddies in Lombardy and Piedmont, over an area of about 200,000 ha, which correspond to 86% of the total Italian rice area. Its expansion is thought to follow a type of stratified dispersal, due both to insect adult active dispersal and to accidental movements caused by human transportation.

Downloads

Download data is not yet available.

How to Cite



On the spatial spread of the Rice Water Weevil, Lissorhoptrus oryzophilus Kuschel (Coleoptera: Erirhinidae), in Italy. (2010). Journal of Entomological and Acarological Research, 42(2), 81-90. https://doi.org/10.4081/jear.2010.81

PAGEPress has chosen to apply the Creative Commons Attribution NonCommercial 4.0 International License (CC BY-NC 4.0) to all manuscripts to be published.