2Sanne R, Liefrink. The inspection of Dutch seed potatoes-theimportance of approval [M]. Den Haag: Den Haag offset, 2005.
3Haan E G de, Bovenkamp G W van den. Test development inErwinia at the NAK: BioPlex real-time PCR [J]. Gewasbescherming,2009, 40(4): 172-175.
4Have your potatoes examined at NAK services and get thebest insight into the quality of your seed potatoes [EB/OL].[2012-02-20]. http:// www. nak. nl/ public/ upload/ 2012/ NAK%20Services/Attachment%20Circulaire%20virus%20and%20bacterial%20diagnostics%20in%20potatoes%202015-2016.pdf.