Demo seed potatoes

You are growing seed potatoes and the following cultivars are available:

Bintje (susceptible to all pathotypes of the potato cyst nematode)
Innovator (susceptible to G. rostochiensis (pathotypes A, B and C), highly resistant to G. pallida (pathotypes D and E).

Field 1

Last soil fumigation carried out in 2004.
Last potato crop (Bintje) in 2007.
After the 2007 crop a voluntary AMI (PCN Intensive) sampling was carried out (about 6.5 kg soil from 1 ha). One viable potato cyst (G. pallida) was detected.
In February 2010 the field was sampled once more using the statutory Amex600: 1 ha soil sampling method (600 ml soil from 1 ha) and the field was officially declared PCN free.
You grow seed potatoes in a 1:3 crop rotation.