Pest Management Science (2015) 71, 1611-1616
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Stopped in its tracks: how lambda-cyhalothrin can break the aphid transmission of a potato potyvirus
Pest Management Science 71 (12), 1611-1616
Abstract:
BACKGROUND
Pyrethroids are one of the most widespread and commonly used classes of insecticide and are used in multiple roles, including protecting potato crops from virus vector aphids. Resistance in some genotypes of a few species is now widespread, but most species remain susceptible. The rate of virus transmission by two genotypes of the peach potato aphid, Myzus persicae, fed on potato virus Y (PVY)-infected leaves of potato treated with the pyrethroid lambda-cyhalothrin was evaluated.
RESULTS
The susceptible genotype, type J, was significantly inhibited from transmitting virus to uninfected seedlings. A genotype containing the M918L super knockdown resistance mutation conferring resistance to pyrethroids, type O, showed no inhibition of transmission. However, when survival of the aphids after exposure was compared, the pyrethroid had not killed the type J aphids.
CONCLUSIONS
lambda-Cyhalothrin in a commercial formulation disrupts PVY transmission by disorienting aphid vectors for a sufficient time for the virus to lose its transmissibility. However, M. persicae genotypes carrying the M918L mutation are not prevented from transmitting.
(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): Brian Fenton
Research topic(s) for pests/diseases/weeds:
transmission/dispersal of plant diseases
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant. |
|---|---|---|---|---|
| Myzus persicae | Potato (Solanum tuberosum) | |||
| Potato virus Y | Potato (Solanum tuberosum) |
