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Neotrop Entomol

Title:		Geostatistics and Geographic Information Systems to Study the Spatial Distribution of Grapholita molesta (Busck) (Lepidoptera: Tortricidae) in Peach Fields
Author(s):		Duarte F; Calvo MV; Borges A; Scatoni IB;
Address:		"Division Proteccion Agricola, Direccion General de Servicios Agricolas, Ministerio de Ganaderia Agricultura y Pesca Av. Millan 4703, 12900, Montevideo, Uruguay, fduarte@mgap.gub.uy"
Journal Title:		Neotrop Entomol
Year:		2015
Volume:		20150514
Issue:		4
Page Number:		319 - 327
DOI:		10.1007/s13744-015-0288-3
ISSN/ISBN:		1678-8052 (Electronic) 1519-566X (Linking)
Abstract:		"The oriental fruit moth, Grapholita molesta (Busck), is the most serious pest in peach, and several insecticide applications are required to reduce crop damage to acceptable levels. Geostatistics and Geographic Information Systems (GIS) are employed to measure the range of spatial correlation of G. molesta in order to define the optimum sampling distance for performing spatial analysis and to determine the current distribution of the pest in peach orchards of southern Uruguay. From 2007 to 2010, 135 pheromone traps per season were installed and georeferenced in peach orchards distributed over 50,000 ha. Male adult captures were recorded weekly from September to April. Structural analysis of the captures was performed, yielding 14 semivariograms for the accumulated captures analyzed by generation and growing season. Two sets of maps were constructed to describe the pest distribution. Nine significant models were obtained in the 14 evaluated periods. The range estimated for the correlation was from 908 to 6884 m. Three hot spots of high population level and some areas with comparatively low populations were constant over the 3-year period, while there is a greater variation in the size of the population in different generations and years in other areas"
Keywords:		Animal Distribution Animals Demography *Geographic Information Systems *Lepidoptera Male Prunus persica/*parasitology Uruguay;
Notes:		"MedlineDuarte, F Calvo, M V Borges, A Scatoni, I B eng Research Support, Non-U.S. Gov't Netherlands 2015/07/16 Neotrop Entomol. 2015 Aug; 44(4):319-27. doi: 10.1007/s13744-015-0288-3. Epub 2015 May 14"