ne.s.(HeUT.)»12 



TABLE 5 



Tests of various resistant crosses against five local races of 



potato root eelworm. Cumijlative results of thr ee 



visual assessments of cysts on the peripheral root system. 



Source of Cysts 



Duddingston Bog Hall Feltwell Frainpton rtothamsted (1) 

 Midloth. Hidloth. Norfolk Lines. Herts. 



Resistant plants : 



C.P.C. 1673 line 



2201(17U) S. andigena 



2296. 2(6U) Fl cross 



Y2/26 Fl cross 



2371b(l^ Bl cross 



C.P.C. 1685 line 



Potato (Arran Banner) 

 Tomato (Klondyke "Red) 



Key: - No cysts visible on external mat of roots. 

 + Up to 5 cysts visible. 

 ++ 5-l5 cysts visible. 

 +++ l5-50 cysts visible. 

 ++++ Over $0 cysts visible. 



Grovm from cuttings and therefore retarded in development compared with 

 other plants. 



