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Spatial and temporal distribution of Empoasca vitis within a vineyard

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Abstract

1 The intra-plot spatial distribution of the green leafhopper Empoasca vitis (Goethe) (Cicadellidae, Empoascini) was assessed over three successive growing seasons in a Bordeaux vineyard. Weekly measurements of adult trappings and nymphal counts were performed in a 1.7-ha plot on 130 sampling points.

2 Statistical and geostatistical analyses revealed inconsistent spatial distributions of adults and nymphs in spring, but consistent spatial distributions in summer, which were identical every year.

3 Similarities between spatial distributions of the mobile adults and the sedentary and aggregated nymphs strongly suggest that adults disperse inside the plot to areas preferred for egg deposition.

4 The similarity of summer populations among years suggests that this insects distribution is based on (perennial) differences in plot characteristics.
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Keywords: Aggregation; cartography; cicadellidae; geostatistics; migration; viticulture

Document Type: Research Article

Publication date: 2008-05-01

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