Potato Review

Advertorial Results of soil testing in Scotland have highlighted the alarming speed at which PCN infestations can spread and increase. With PCN recognised as a primary threat to sustainable long-term profitable potato production, the research has focussed attention on maintaining clean land resources and managing existing populations more effectively, writes Syngenta Potato Technical Manager, Michael Tait. Speaking at the 5th Symposium of Potato Cysts Management earlier this year, Dr Jon Pickup of SASA, reported the area infested with Globodera pallida is currently doubling every seven to eight years. He warned the rapid increase in G. pallida in Scotland, combined with the area already infected by G. rostochiensis , poses a serious threat to the country’s future seed production, which can only be grown on PCN free land. His views have been echoed by the AHDB, which has identified the rapid spread of PCN into new areas where it has not previously been found. It is actively recommending growers who have historically considered themselves free of PCN, to now undertake extensive soil sampling. Research has shown that G pallida can be especially difficult to control culturally, since its natural decline rates are significantly slower, compared to G. rostochiensis . Moreover, G pallida typically hatches over a prolonged period that could limit any benefit of a short-term biofumigant and can lead to higher multiplication rates. Syngenta potato trials have repeatedly shown that Nemathorin can be very effective at both protecting the yield and tuber quality of the treated crop from damaging effects of nematode feeding to roots, as well as limiting PCN multiplication rates. Importantly, control of later hatching G. pallida is especially valuable in preventing a build-up of viable cysts in the soil at the end of the season. Work has also shown potential benefits from PCN control reducing the impact of soil-borne pathogens getting into the plant, along with stronger root development helping crop vigour and reducing other stress induced issues through the growing season. Wireworm damage in potatoes has reportedly been increasing in recent years, according to the AHDB. Increases have been seen in both traditional west-country mixed grassland areas, along with all arable rotations in the eastern counties. Risk assessment tools are essential to recognise and minimise potentially damaging situations. But with increasingly limited options, Nemathorin remains as the key soil treatment to reduce damage to tubers and to help maximise marketable yield. NEMATHORIN (MAPP 11003) contains fosthiazate. NEMATHORIN is a registered Trademark of Ishihara Sangyo Kaisha, Ltd, 3-15, Edobori, 1-chome, Nishi-ku, Osaka, Japan. Use plant protection products safely. Always read the label and product information before use. For further product information, including warning phrases and symbols, refer to www.syngenta.co.uk Syngenta UK Ltd. Registered in England No. 849037. CPC4, Capital Park, Fulbourn, Cambridge CB21 5XE Tel: 01223 883400 Fax: 01223 882195 Technical Enquiries Tel: 0800 169 6058 Email: customer.services@syngenta.com Website: www.syngenta.co.uk Michael Tait Pallida spread raises PCN risks Wireworm damage PCN Cysts The Nematicide Stewardship Programme, supported by Syngenta, aims to ensure a best practice approach across all aspects of granular nematicide use. Alsways follow the best practice steps. www.nspstewardship.co.uk