Potato cyst nematode testing
Helping potato growers understand the extent and severity of potato cyst nematode (PCN) infection
ADAS offers analysis of soil samples at our Pest Evaluation Services laboratory at High Mowthrope in North Yorkshire. Analysis results come with an entomology report to explain the findings and appropriate next steps by an independent ADAS entomologist.
Order a soil sampling kit for analysisResources
What is potato cyst nematode (PCN)?
Potato cyst nematode (PCN), also known as potato eelworm, is the most significant pest of potatoes in the UK, costing the UK potato industry an estimated £50 million annually. PCN attacks the roots of the potato plant which can lead to stunted growth, reduced yield and wilting.
It is vital to sample the soil prior to planting. Good management depends on first understanding the level of infestation. Symptoms may be difficult to recognise in the early stages but if left unchecked, PCN will be difficult to stop.
What makes PCN so problematic?
There are two distinct species of PCN: the white PCN (Globodera pallida) and the yellow PCN (G rostochiensis). The white PCN is the most common in the UK. The nematodes themselves can’t be seen but the cyst eggs can be found attached to potato roots.
In the absence of a host potato crop, a proportion of the larvae will hatch each year, escape into the soil and die. However, there may be some eggs waiting to hatch in cysts for over 10 years. These will multiply rapidly again when a new host is planted. This ability of PCN to persist in soil for such a long period makes it so damaging and difficult to control.
Getting an accurate reading of the extent of the PCN problem on your land is key to both minimising the use of chemical nematicides and safe planning of crop rotations.
Order PCN soil testing
We offer an accurate soil assessment which will indicate the level of PCN cyst infestation per 100g soil and egg infestation per gram of soil. This analysis will also come with an interpretation by our expert nematologists so you can understand the extent of any infestation.
To get started, you will need to order a soil sampling kit. The total cost for the kit, return postage, soil analysis and the nematologist report is £29 plus VAT. Payment is via invoice.
One sampling kit will cover one hectare of land. If you need to test multiple hectares, you will need to order multiple sampling kits.
Order a soil sampling kitCollecting your soil sample
The ideal time to test is September to March, before cropping has begun. Avoid testing during very cold, very wet or very dry conditions as it could impact the quality of the sample.
Sampling instructions
Divide land into sample areas
Divide land into sample areas
Divide land into sample areas, ideally of 1 hectare or less in size, avoiding field edges or wheelings running through field.
User a corer to collect samples
User a corer to collect samples
Use a corer with a diameter of 10–15mm to take the samples. A cheese corer is preferable although a screw auger may be used. Insert the corer to a depth of 15cm to 25cm and collect the soil in the plastic bag provided by ADAS.
Take at least 49 samples from across the field
Take at least 49 samples from across the field
Take a minimum of 49 cores in a grid pattern. This should produce over 2kg of soil. Sampling in a grid will give you the best chance of finding PCN. A W shaped sampling pattern can be used and is quicker, but if you decide to use this make sure that your ‘W’ travels across the direction of cultivation rather than with it.
Return the soil samples to ADAS
Return the soil samples to ADAS
Label your sample as per the included kit instructions and take to your nearest post office or collection point with the prepaid return address label. If you are sampling multiple fields, repeat this process for each one separately and ensure that the correct labels are placed on to each sample. Return each sample in separate postage bags.
Sending your soil sample back to us
Once your soil sample(s) are returned to us via the pre-paid postage bag, included within the kit, we will provide you with an assessment of PCN levels along with an entomology report explaining your results. You should receive this within 10 working days of us receiving your sample. If you need more information about PCN or need assistance with taking your sample, contact us enquiries@adas.co.uk.