InthevarietyofPicassothesignsofinfectionstartedtoshowafterfourweeks,evenwithadoseof10 spore/ml of the antagonist, and the infection symptoms were more pronounced and were observed in 4.5% - 4.7% of this variety’s tubers at a dose of 104 cells/ml of antagonist. The control group or untreated potatoes of all varieties incurred 100% damage within four weeks of the experiment beginning