Potato Review

Advertorial Soil sampling and testing for PCN remains the only way to evaluate the true extent of pest infestation. It is crucial to accurately map any change in populations that could in uence rotations and control strategy decisions. However, AHDB research warns that by the time one cyst is found in soil sampling, PCN populations will be in the millions. Speciation of PCN soil samples can provide a guide as to the extent of mixed G. rostochiensis and G. pallida presence. Over the past decade, however, G. pallida has become by far the more dominant, and in many instances the only, species present. The rise in prevalence of G. pallida has created additional challenges for growers and agronomists to address with IPM programmes. The species survives for longer as viable cysts in the soil, which requires longer rotational breaks to achieve desired signi cant natural decline in populations. Furthermore, G. pallida tends to hatch over a more protracted time span, compared to G. rostochiensis. That could result in juvenile nematodes emerging much later in the season, when control rates from nematicides may be reduced. Both of these factors signal the preference for using Nemathorin as part of an integrated approach to PCN control, and the importance of accurate application and incorporation. Whilst IPM practices - including trap crops, resistant varieties and extended rotations - can help to suppress PCN populations, nematicides still play a key role in keeping numbers at sustainable low levels for long-term production. PCN hit crops are weaker and stunted and, with poorer rooting, are less efficient in use of nutrients and moisture, as well as more susceptible to stress from heat and drought. AHDB estimate losses attributed to PCN to be in excess of £25m a year across the UK. Nemathorin is trusted and proven to provide effective control of G. pallida, across a full range of soil types – both for the protection of yield of the growing crop and the reduction of cyst counts at the end of the season. It has also been shown to be more effective in control of later hatching nematodes. To maintain the highest levels of control, the granules must be evenly mixed in the soil pro le surrounding the seed tuber. PCN cysts in the soil are triggered to hatch by the presence of exudates from emerging potato roots – which are then subjected to feeding damage from juveniles and creation of potential entry points for soil-borne diseases. The Nematicide Stewardship Programme website has a wealth of resources, essential on-line training and a handy six-point plan to help achieve accurate application and best practice approach – www.nspstewardship.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 NEMATHORIN® is a Registered Trademark of Ishihara Sangyo Kaisha, Ltd., 3-15, Edobori, 1-chome, Nishi-ku, Osaka, Japan. NEMATHORIN (MAPP 11003) contains fosthiazate. All other brand names used are Trademarks of other manufacturers in which proprietary rights may exist. 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 Targeting PCN problems Nematicides remain an essential component of the latest IPM strategies - to protect current crop yields and manage long-term PCN populations. Syngenta Technical Manager, Michael Tait , highlights why and how to get the best results from Nemathorin granules Potato Science Live 2021 This season the Syngenta Potato Science Live events will take place as an on-line learning resource. Each day, for a dedicated week from February 8th, there will be short topic focused morning Zoom meetings, to bring growers and agronomists up to date with the latest news and advice for pro table potato production. From seed- and soil-borne pathogens, to PCN, blight and sustainability, you can join them all, or pick your speci c interests. Visit the Syngenta website to register: www.syngenta.co.uk/events