Journal of Pest Science (2017) 90, 447-457

Aude Gilabert, Bertrand Gauffre, Nicolas Parisey, Jean-François Le Gallic, Patrick Lhomme, Vincent Bretagnolle, Charles-Antoine Dedryver, Jacques Baudry and Manuel Plantegenest (2017)
Influence of the surrounding landscape on the colonization rate of cereal aphids and phytovirus transmission in autumn
Journal of Pest Science 90 (2), 447-457
Abstract: Ecological control has often focused on factors enhancing control of pests by their natural enemies, while factors reducing the colonization rate of crops by pests have been comparatively neglected. We present an approach to assess landscape influence on the intensity of wheat colonization by a major crop pest, the aphid Rhopalosiphum padi. We used trays containing wheat seedlings to monitor field colonization by R. padi and barley yellow dwarf viruses' transmission in two areas in France in autumn. We assessed the influence of landscape components likely affecting aphid colonization, i.e. maize and grasslands as source of migrants on the number of aphids landing per tray, as well as the host plant of origin and the viruliferous potential of migrants. During the survey, maize was the main source of migrants. Virus transmission was detected in a few cases (4 % positive assays). Colonization was increased by the presence of maize, but reduced by the presence of grasslands at the landscape scale considered here (i.e. at a radius of 1000 m). Our study contributes to a better understanding of disease dynamics in agricultural landscapes. By identifying features of the landscape that surrounds fields and affects these dynamics, growers can develop more efficient crop protection strategies relying on habitat manipulation and rational use of pesticides.
(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): Charles-Antoine Dedryver

Research topic(s) for pests/diseases/weeds:
transmission/dispersal of plant diseases
environment - cropping system/rotation

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Barley yellow dwarf viruses	Wheat (Triticum)	France
	Rhopalosiphum padi		France