Fine Characterization of a Resistance Phenotype by Analyzing TuYV- Myzus persicae -Rapeseed Interactions

Turnip yellows virus (TuYV), transmitted by , can be controlled in rapeseed fields by insecticide treatments. However, the recent ban of the neonicotinoids together with the description of pyrethrinoid-resistant aphids has weakened insecticide-based control methods available to farmers. Since the de...

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Bibliographic Details
Published in:Plants (Basel) 2021-02, Vol.10 (2), p.317
Main Authors: Souquet, Marlène, Pichon, Elodie, Armand, Thomas, Jacquot, Emmanuel
Format: Article
Language:English
Subjects:
aphid
Architects
Brassica
Brassica napus
Control methods
Cultivars
Disease resistance
Disease transmission
Epidemiology
Flowers & plants
Genotype & phenotype
Infections
Insecticide resistance
Insecticides
Insects
Latency
Life Sciences
Myzus persicae
Pathogens
Pest resistance
Phenotypes
Phytopathology and phytopharmacy
Rapeseed
resistance
transmission
turnip yellows virus
Vegetal Biology
viral disease
Viral diseases
Viral infections
Viruses
Yellows
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Description
Summary:Turnip yellows virus (TuYV), transmitted by , can be controlled in rapeseed fields by insecticide treatments. However, the recent ban of the neonicotinoids together with the description of pyrethrinoid-resistant aphids has weakened insecticide-based control methods available to farmers. Since the deployment of insecticides in the 1980s, few research efforts were made to breed for rapeseed cultivars resistant to aphid-borne viral diseases. Thus, only few rapeseed cultivars released in Europe were reported to be TuYV-resistant, and the resistance phenotype of these cultivars was poorly characterized. In this study, several epidemiological parameters (infection rate, latency period, etc.) associated to the TuYV-resistance of the cv. Architect were estimated. Results showed a partial resistance phenotype for plants inoculated at the 2-/4-leaves stages and a resistance phenotype for plants inoculated at a more advanced growing stage. Moreover, analysis of infected plants highlighted (i) a poor quality of infected cv. Architect as a source of virus for transmission and (ii) an extended latency period for infected plants. Thus, dynamics of virus spread in the field should to be slower for Architect compared to susceptible rapeseed cultivars, which should lead to the maintenance of a higher proportion of healthy plants in the field.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants10020317