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PCN Calculator, Integrated Control of Globodera pallida

PCN Calculator, Integrated Control of Globodera pallida

Potato cyst nematode is the most important potato pest in the UK and may cause substantial loss of yield. There are two species of PCN, Globodera rostochiensis and Globodera pallida. G. pallida has become widespread due to its prolonged hatching period and the selection pressure created by the cultivation of many varieties that are resistant to G. rostochiensis but susceptible to G. pallida.

This PCN Pallida calculator replaces an earlier CD-based version. This model can be updated with new information as it becomes available. Based on feedback, this web version is more user friendly, allowing for greater flexibility to move around the various input tabs and so demonstrate "what if" scenarios.

This is not a decision support system as it does not offer advice on what you should do. Instead it is an educational tool, or a decision justifier. It will show you the implications of your actions on the level of pallida infestation and the effect on your predicted yield. This will demonstrate that treatment of an infestation is best tackled early when the levels are low, as this is when the use of nematicides has the greatest effect.

The effect on yield is based on mathematical predictions. If the infestation is very low, the yield reduction can be so low as to be unnoticeable when a crop is commercially harvested. This can lead to a false economy and the thinking that PCN can be ignored as there was no visible drop in the expected yield. The effect on the Pf or final population after harvest could create issues for subsequent potato crops.

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Population Trends
Predicted Yield (t/ha)
Yield Trends
Time (Year)
Population Predictions
Yield Predictions