Iic;i.{hrAvr.):lZ 



TA^].^. ^ 



Tests of various resistant 5. andi p;en a - 3. tuberosum crosses 

 against i'lve local rr.ces of potato root eelworm 



Source of cysts Duddingston Bor, Hall Feltwell Frampton Itothamsted 



No. of cvsts added per pot.. ^2 [j2 50 56 5U 



Estmated egg content 7,5hO 7,602 7,672 7,U52 7,^00 



Hatchable larvae in 21 



days at 25° C U,750 3,l50 5,500 3,900 li,U50 



New cysts per pot at the end of the test 



Means for resisters 1,377 21 13 309 UO 



Control Plants: 



"ans 



Potato (Arran Banner) 3^0 l,6l5 2,272 593 2,790 l,5l6 



Tomato (Klondykc Red) U8 220 ll|6 83 l52 1^ 



