FOLLOWING HSE's rejection of the four emergency authorisations submitted by AHDB for Vydate 10G, manufacturer Corteva Agriscience has advised that all full, part full and empty Vydate 10G Ecolite containers should be returned to suppliers by April 15th, to allow sufficient time to meet the 30th April deadline for removal from the market.
This follows the decision not to re-authorise Vydate for sale, distribution and use in the UK beyond December 31st 2020 and means that growers of potatoes, carrots, parsnips, onions, garlic and shallots can no longer use it.
Vydate has been the industry standard for PCN control in short-season potato crops and for suppression of free-living nematodes in potatoes, carrots and parsnips.
Its loss will affect around 20% of the GB potato area according to Scottish Agronomy’s Eric Anderson.
He said growers will need to assess alternatives swiftly and he advises weighing up product performance, the capital cost of application equipment and use period, together with the practicality of application.
“In elevated PCN situations, Nemathorin 10G applied overall will give the most consistent result and can be applied through the granular application equipment growers already have,” said Eric.
But he says growers must note the restriction that Nemathorin treated potato crops must be grown for a minimum of 17 weeks before being desiccated or lifted green top, whichever comes first.
“Those considering a switch to Velum Prime would be well advised to go for in-furrow application at planting to expedite application through existing equipment i.e. Team applicators.”
Mr Anderson said he finds this configuration preferable to either an application system mounted to the same tractor as the tilling machine, or a conventional boom sprayer applying in advance of the bed tiller.
Another option is NEMguard PCN, a granular biocontrol formulated from garlic extract marketed in the UK by Certis Europe.
The company’s Neil Beadle said: “Nemguard can help reduce nematode damage in potato crops and can be applied using the same rotors/cassettes currently in place for Vydate application. The operator simply recalibrates to deliver the correct dose.
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