Influence of fungicides of different chemical nature on the biochemical structure of fruit Vaccinium corymbosum L. in the conditions of Belarus

The article presents the results of the studies of the effect of fungicides – the Bellis chemical and the HealthBerrin bacterial and the HealthBerrin in combination with Potassium Humate fertilizer during two- and four-fold treatments of highbush blueberry plants on the dry matter content, ascorbic and free organic acids, soluble sugars and the indicator of sugar-acid index in fruits within the framework of two field experiments with an identical 6-variant scheme, but at various levels of soil fertility: at a lower level – at the experimental facilities (EF) of the Central Botanical Garden of the National Academy of Sciences of Belarus; at a higher level – at the peasant (farm) household “Yagodnoe lukoshko” (PFH) located 10 km to the north.
The positive effect of the tested fungicides on the set of the biochemical characteristics of blueberry fruits under study turned out to be 1.1–1.7 times higher under the conditions of PFH than at EF, and in both experiments the appliance of the Bellis chemical fungicide was the least successful. Plant treatments with the HealthBerrin in combination with Potassium Humate were 1.1–1.5 times more effective than those treated with the HealthBerrin alone in the experiment at EF and 1.1 times at PFH. At the same time, an increase in the number of treatments contributed to an increase in the effectiveness of the use of both types of micropreparations in the first experiment by 1.2–1.6 times, in the second – by 1.1 times.

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