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Cabbage whiteflies colonise Brassica vegetables primarily from distant, upwind source habitats

Ludwig, Martin and Ludwig, Hella and Conrad, Christopher and Dahms, Thorsten and Mayhöfer, Rainer (2019) Cabbage whiteflies colonise Brassica vegetables primarily from distant, upwind source habitats. Entomologia Experimentalis et Applicata, 1678 (8), pp. 713-721. Wiley. DOI: 10.1111/eea.12827 ISSN 0013-8703

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Official URL: https://doi.org/10.1111/eea.12827

Abstract

The occurrence of species in rapidly changing environments, such as agricultural landscapes, is affected by their ability to recolonise habitats. Knowledge of the landscape scale affecting colonisation is essential for large‐scale pest management. Colonisation by insects can be affected on multiple landscape scales, as different morphs of a species may have specific dispersal abilities. The cabbage whitefly, Aleyrodes proletella (L.) (Hemiptera: Aleyrodidae), a major pest of Brassica vegetables, is known to colonise Brassica vegetables primarily from fields of oilseed rape, Brassica napus L. (Brassicaceae). We used field mapping and remote sensing to characterise the relevant scales for colonisation of Brussels sprouts by cabbage whiteflies. Surprisingly, oilseed rape fields in wide landscapes (2–8 km around study sites) explained colonisation better than oilseed rape areas in local landscapes (200–1 000 m around study sites). The explained variance increased when additional weight was given to upwind source habitats, indicating wind transport of whitefly colonisers. Low importance of local compared to wide landscape source habitats can be explained by the flight behaviour of whitefly morphs. Migratory morphs show phototactic attraction but are attracted by hosts only during the later phases of flight. Therefore, they ignore host plants close to their origin and disperse several kilometres. Trivial flight morphs rarely move more than a few hundred metres. In conclusion, as most whitefly colonisers reached Brassica vegetables from source habitats at a distance of 2–8 km, predictions on pest pressure and landscape‐scale whitefly management should consider these distances. In contrast, oilseed rape fields in the local landscape, which usually worry farmers, had little effect.

Item URL in elib:https://elib.dlr.de/132496/
Document Type:Article
Title:Cabbage whiteflies colonise Brassica vegetables primarily from distant, upwind source habitats
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ludwig, Martinludwig (at) ipp.uni-hannover.deUNSPECIFIED
Ludwig, HellaUNSPECIFIEDUNSPECIFIED
Conrad, Christopherchristopher.conrad (at) geo.uni-halle.deUNSPECIFIED
Dahms, Thorstenthorsten.dahms (at) uni-wuerzburg.deUNSPECIFIED
Mayhöfer, RainerUNSPECIFIEDUNSPECIFIED
Date:2019
Journal or Publication Title:Entomologia Experimentalis et Applicata
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:1678
DOI :10.1111/eea.12827
Page Range:pp. 713-721
Publisher:Wiley
ISSN:0013-8703
Status:Published
Keywords:Aleyrodes proletella, wind dispersal, landscape-scale pest management, satellite image,remote sensing, spillover, Hemiptera, Aleyrodidae, Brassicaceae, oilseed rape
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Geowissenschaftl. Fernerkundungs- und GIS-Verfahren
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center
Deposited By: Wöhrl, Monika
Deposited On:09 Dec 2019 13:38
Last Modified:09 Dec 2019 13:38

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