DOI: 10.5061/dryad.n04pb
title: Data from: Crop-dominated landscapes have higher vector-borne plant virus prevalence

description: Landscape composition affects local arthropod biodiversity, including
 herbivorous insects and their predators, yet to date landscape effects on
 insect-vectored plant diseases have received little attention. Here, we
 examine how landscape composition affects the prevalence of a viral
 pathogen in host plants, and the role the arthropod vector assemblage
 plays in mediating landscape effects. We measured the effect of landscape
 composition (measured as percentage of cropland and unmanaged land) on the
 plant virus Potato virus Y (PVY), its aphid vectors, and their coccinellid
 predators during the 2012 and 2013 field seasons at 19–21 farms. In both
 years, we found a positive relationship between final virus prevalence and
 percentage of cropland within 500, 1000 and 1500 m surrounding study
 sites. Percentage of cropland also had a significant negative effect on
 aphid species richness, and the aphid community composition in turn
 affected PVY prevalence. By contrast, landscape composition had no
 measurable effect on coccinellid abundance or species richness in this
 study. Synthesis and applications. Our work demonstrates that landscape
 composition plays an important role in vector-borne pathogen spread, and
 that pathogen spread appears to be mediated by the effects of the
 landscape on the insect vector community. The small spatial scale (≤1500
 m) of the effects seen in our study indicates that on-farm management
 practices have the potential to reduce virus prevalence on small-scale
 farms. Farmers may be able to reduce Potato virus Y prevalence by on-farm
 diversification, by isolating potato fields from other agricultural crops,
 and by not using saved potato seed.
description: Landscape and Insect
 Community DatasetThe dataset is arranged
 with rows separated by research site and year, with columns of data. The
 dataset consists of the following columns of data: research site ID (Farm
 ID), research year (Year; 1=2012, 2=2013), the area of the potato field
 sampled as a research site in square meters (FieldArea) initial number of
 plants infected (InitialInfected), the final number of plants infected
 (FinalInfected), the difference in the number of plants infected
 (Infected; FinalInfected-InitialInfected), the number of plants sampled
 (NPlants), the number of times the plants were sampled throughout the
 season (NSamples), the number of insect traps collected throughout the
 season (NTraps), the number of aphids collected throughout the season
 (Naphids), the number of aphids collected throughout the season that were
 identified to species or genera (NAphidsID), aphid species richness
 (NAphidSpp, meaning the count of aphid species collected throughout the
 season), the interpolated aphid species richness (AphidRichness), the
 Shannon diversity of the aphid community (ShannonDiversity), the number of
 coccinellids collected throughout the season (PredatorAbundance), the
 coccinellid species richness (Predator Richness, meaning the count of
 coccinellid species found throughout the season), the percentage of
 unmanaged land within a 500 m radius of the site (Nat500), the percentage
 of unmanaged land within a 1000 m radius of the site (Nat1000) the
 percentage of unmanaged land within a 1500 m radius of the site (Nat1500),
 the percentage of cropland within a 500 m radius of the site (Ag500), the
 percentage of cropland within a 1000 m radius of the site (Ag1000), and
 the percentage of cropland within a 1500m radius of the site
 (Ag1500).Final
 Dataset.csv