EFFECT OF EARLY PLANTING ON THE TOLERANCE OF POTATO CV. EHUD TO ATTACK BY GLOBODERA ROSTOCHIENSIS PATHOTYPE RO 1 AND G. PALLIDA PATHOTYPE PA 3.

J. W. Seinhorst

Abstract


Planting potato cv. Ehud (highly resistant to Globodera rostochiensis pathotype Ro 1 but susceptible to G. pallida pathotype Pa 3) in the end of February in a cold glasshouse resulted in stunted growth and shortening of the growing period (short day habitus). There was a strong reduction of the tolerance to pathotype Ro 1 of G. rostochiensis and a somewhat smaller on to pathotype Pa 3 of G. pallida compared to the respective tolerances of cv. Ehud when planted in April.

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