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Abstract Lostharvest potato tuber r o t s were survayed on potatoes held in e i t h e r r e f r i g e r a t e d warehouses o r 1tawa.Lltt (colAuL~sotno r a g e ) . ’l’he t y p e and n a t u r e of the cwsd rotting microorganisms in e i t h e r com-”,or, or. cold stores were k’~uaril~iu1o lani (hart. ) Lncc ,, kythium ultih~ulT~r~ow , hrwinia c a r o t o v o r a vur . curotovora Dye and Erwinia carotovora var . stroueptica (ilelluierd md IJowsorl) bye. which v~er-c: i s o l a t e d arld icieatii’ied from po tjtoeu showing dry r o t , watery wound r o t , soft r o t and blackleg sympt o m ~,~ r e s p e c t i v e l y . -In v i t r o s t u d i e s t h e e f f e c t of d i f f e r e n t conc e n t r a t i o n s of sprout i n h i b i t o r Birgin (IPC) on cert a i n fupgal growth determined as mean diameter of c o l o n i e s of both -1’ . soluni and -I) . ultinaun i n d i c a t e d that the sprout i n h i b i t o r at r e l a t i v e l y high concentratians, i.e. 40 and 80 ul/l s i g n i f i c a n t l y reduced growth of - .’1 ulti~i~um-P’,. solmi, r e s p e c t i v e l y . Ef f e c t of the sprout i n h i b i t o r birgin on. spore germination of -1’ . solmi i n d i c a t e d t h a t g emi n a t e d c o n i d i a o f -F. uolarli were ui@lii’icantly reduced at 40 ul/l of the tested sprout inhibit or. |