The effect of application of biopreparations and fungicides on the yield and selected parameters of seed value of seed potatoes

Abstract

EM (Effective Microorganisms) and herbal extracts on the yield and on the quality parameters of seed potatoes. The protection variant with the use of fungicides contributed significantly to a decrease in the yield of seed potatoes, relative to the control treatment. All plant protection variants caused a significant increase in the numbers and multiplication factor of seed potatoes, relative to the control treatment. The genetic traits of the cultivars had a significant impact on the yield and number of seed potatoes, but they did not differentiate the average mass of seed potatoes and the values of the multiplication factor. The weather and soil conditions in the years of the study significantly determined the evaluated parameters. K e y w o r d s: effective microorganisms, plant extracts, fungicides, cultivars, yield, seed value P. PSZCZÓŁKOWSKI, B. SAWICKA 240