council direct decemb control potato cyst eelworm eec council european commun regard treati establish european econom commun articl thereof regard propos commiss regard opinion european parliament regard opinion econom social committe potato product occupi import place commun agricultur potato yield constantli threaten harm organ protect potato cultiv harm organ product capac maintain agricultur product increas proctect measur prevent introduct harm organ individu member state limit effect organ control simultan method commun prevent spread organ harm potato potato cyst eelworm heterodera rostochiensi woll pest occur member state contamin area commun perman risk potato cultiv commun effect measur control pest prevent spread erad pest minimum provis adopt commun member state adopt addit stricter provis potato varieti resist pathotyp pest plai import role contamin plot help extent gener interest publish period list varieti determin presenc contamin resist varieti appear appli method member state rais object adopt direct articl direct concern minimum measur member state control potato cyst eelworm heterodera rostochiensi woll prevent spread articl member state provid seed potato intend market produc plot offici investig recognis uncontamin potato cyst eelworm oj articl occurr potato cyst eelworm record member state demarc contamin plot articl member state provid contamin plot potato grown plant intend transplant grown store ground articl member state provid seed potato contamin suspect contamin distribut seed potato treat longer contamin articl member state revok measur control potato cyst eelworm prevent spread longer found present articl member state prohibit hold potato cyst eelworm articl member state authoris derog measur refer articl scientif purpos test select work derog articl grow contamin plot varieti potato resist pathotyp potato cyst eelworm found plot derog articl grow contamin plot potato seed potato provid ensur potato harvest cyst potato cyst eelworm matur derog articl grow contamin plot potato seed potato ground disinfect mean member state ensur authoris refer paragraph grant adequ control guarante prejudic control potato cyst eelworm creat risk spread pest potato varieti regard resist pathotyp potato cyst eelworm varieti grown natur annual decreas popul pathotyp found occur articl member state adopt addit stricter provis requir control potato cyst eelworm prevent spread articl member state commun commiss januari year list varieti potato accept market found offici investig resist potato cyst eelworm state pathotyp varieti resist commiss ensur list resist varieti base commun member state publish year februari articl member state ensur contamin potato cyst eelworm resist potato varieti pest determin method member state rais object articl member state bring forc measur compli direct year notif forthwith inform commiss thereof articl direct address member state brussel decemb council presid lun