Application of a Geographical Information System (GIS) to the Study of Sirex noctilio F. (Hymenoptera-Siricidae) in Calamuchita Valley, Córdoba, Argentina

A. Lopez, M. Demaestri, E. Zupan, O. Barotto, S. Viale, A. Degioanni

Abstract


In the Valley of Calamuchita (Córdoba-Argentina), a forested area with 36,202 ha. of Pinus spp., it has been developed from 1996 a Geographical Information System (GIS) as a complementary tool for the study of the pest Sirex noctilio Fabricius. The objective is to store, to organize, to contrast and to analyze the obtained data of the study of Sirex noctilio F., with the purpose of generating new information that will serve as a basis in the definition of a strategy of pest management. In seven operative areas, were establishied points of sampling in permanent transects across different sites. In each one it was registered, degree attacks of the pest, management, density and age of the stand and its geographical position with GPS. The GIS was carried out with the data originated from the monitoring. The GIS was integrated by a space database and a database with thematic information. The result consisted on the elaboration of analogical maps by means of the visual analysis of pictures at 1:50.000 scale, digital prosessing of LandSat TM 5 satellite images and elaboration of thematic maps. In the conversion of analogical to digital information, it was used the vectorial system ARC/INFO. The pattern entity-relationship were the approache utylized for the generation of databases. The software used was the Visual dBASE, 1995. This information was modeled cartographically with the software ARCVIEW. As resulted of these activities is possible to have a data base from the last five sampling. It allows to understand not only the attack levels and their temporal variation, but also other aspects of the plantations like composition, management, density and estimated age.

Keywords


Sirex noctilio; GIS; Pinus spp.; management





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