Abstract

ABSTRACTPropagation of potato stocks by the stem cutting method has produced crops almost entirely free from infection with the soft rot coliform bacteria, Erwinia carotovora (Jones) Bergey et al var. atroseptica (Hellmers et Dowson) Dye and E. carotovora var. carotovora Dye. However, low levels of re‐infection have occurred and evidence indicates that a source of the organisms was infected insects. Air‐borne spread of bacterial aerosols generated by raindrop impaction on infected stems might also result in healthy stocks becoming re‐infected.

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