Journal of Applied Entomology - Zeitschrift für angewandte Entomologie (1999) 123, 13-21

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M.P. Grilli and D.E. Gorla (1999)
The distribution and abundance of Delphacidae (Homoptera) in central Argentina
Journal of Applied Entomology - Zeitschrift für angewandte Entomologie 123 (1), 13-21
Abstract: A 3-year field study has been carried out on the distribution and abundance of Delphacidae in central Argentina. Insects were collected along a 300 km transect of seven equally spaced sampling sites. At each sampling station there was one sticky trap 6 m above the ground and five sticky traps 1.5 m above the ground. The sampling frequency was every 6 to 15 days during the spring and summer months and monthly during the rest of the year. Delphacodes kuscheli (vector of a local strain of the maize rough dwarf virus, MRDV-RC), Delphacodes haywardi, Delphacodes balboae, Toya spp., Dicranotropis nigricula and Sogatella kolophon meridiana were collected. Among them, D. kuscheli and Toya spp. comprised 67 and 26% of all the delphacid captured. Delphacodes kuscheli showed a geographical gradient in abundance, coincident with the land management gradient which showed a very heterogeneous landscape (in terms of crop species and land management) dedicated to grain production in the north-eastern part of the study area and a less heterogeneous landscape dedicated to cattle breeding (with large extensions covered with pastures where D. kuscheli reproduces and overwinters) in the south-west. Delphacodes kuscheli showed a high dispersal ability and synchronic dynamics, whereas Toya spp. showed a lower dispersal ability with less synchronic dynamics. The implications for the MRDV-RC transmission is discussed.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Mariano P. Grilli, David Eladio Gorla

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution

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Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Delphacodes kuscheli Argentina
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