The first results from a new series of trials by Syngenta and JP Agronomy, revealed at British Potato 2009 in Harrogate last week, showed that growers could increase yields and improve fry colour and processing quality by using the seed bed combination of Amistar and Nemathorin.
The 2009 trials have also revealed that internal defects in tubers were reduced by more than 12 per cent in untreated plots to just five per cent with Amistar alone and less than four per cent with Nemathorin.
Syngenta potato manager Tom Whitworth said: "In plots where the Nemathorin and Amistar treatments were combined, the internal defects were completely eliminated. The level of tuber damage in the untreated crop would have seen the sample rejected for premium processing markets."
The 2009 trial revealed internal defects in tubers were reduced from over 12 per cent in untreated plots to just five per cent with Amistar alone and less than four per cent with Nemathorin.
"In plots where the treatments were combined, the internal defects were completely eliminated," added Whitworth.
The trials have also shown the Nemathorin and Amistar treatments help crops establish more quickly and maintain ground cover for longer.
In a crop of Hermes, for example, the treated plots achieved 90 per cent ground cover a week ahead of untreated plots and retained more than 55 per cent ground cover at the end of August, when untreated plots had rapidly fallen away to 40 per cent cover.
When tested across a range of varieties, the treatments consistently produced more stems per plant.