The experiment was conducted at the Experimental Station near Krakow in 2008 and 2009. The objects of the experiment were twelve-year-old pear trees cv. 'Conference'. The aim of the experiment was to evaluate the effect of three commercial preparations, containing two forms of the auxin NAA and the cytokinin BA, on the fruit set, total yield, fruit weight and the firmness, acidity and soluble solids content of the flesh. Treatments were carried out when fruitlets were 12 mm in diameter. Control trees were not treated. All the combinations used decreased fruit set and total yield, but increased fruit weight. The applied preparations had no clear effect on the acidity and soluble solids content of the fruit juice. None of the treatments affected fruit firmness, acidity and soluble solids content of the fruit juice after harvest and after storage.