Velum Prime, the liquid nematicide containing fluopyram from Bayer Crop Science, can now be used for the suppression of plant parasitic nematodes in potatoes (ware, seed and salad crops). 

Velum Prime is already effective against both species of potato cyst nematode (PCN) Globodera rostochiensisand Globodera pallida.  The new authorisation granted in April 2022 means that Velum Prime can now also be used for the reduction of Spraing symptoms resulting from Tobacco rattle virus (TRV) transmitted by species of free-living nematodes (FLN).

The authorisation for the use of Velum Prime against FLN mirrors that granted previously for the use in carrots where FLN have been found to cause fanging and vector virus.

Antonia Walker, Bayer campaign manager for roots, said the news will be welcomed by potato growers due to the lack of alternative options with a short harvest interval.

“This authorisation, which comes in time for the main planting season, will be welcomed by those for which spraing is an issue, as it allows for FLN populations to be managed at the same time as it is applied against PCN,” Antonia Walker said.

The nature of TRV vector transmission means that control is difficult, so Velum Prime must be used as part of a wider integrated pest management strategy, explains Miss Walker.

“Velum Prime may reduce the symptoms of TRV, but will not eliminate them. Potato varieties can vary in their susceptibility to and expression of Spraing symptoms. This should be taken into account when choosing to plant fields that are considered at risk from Spraing. Seed and soil testing, field history, and soil type, location and rotation should all be carefully considered when selecting fields for planting as should the use of chemical suppressants, such as Velum Prime,” Miss Walker said.