Nutritional elements content, growth and development dynamics of plants of the genus Rosa L. ‘Duc de Constantine’ (Soupert & Notting, 1857) variety and Monarda didyma L. under the conditions of greenhouse and open air growing at affection by the agent of Erysiphales and the presence of silicon-containing mixes are analyzed. It was established that the use of silicon-containing mixes accelerates growth processes, supports a longer flowering period, decreases the spread of the disease and reduces the intensity of plant damage by powdery mildew micromycetes. Under conditions of pathogenesis, the increase of nitrogen and manganese content in the leaves of plants, and an essential decrease of phosphorus, potassium, calcium, magnesium and iron content were observed. There was an increase of nitrogen, potassium, phosphorus and calcium content in the leaves at the application of calcium silicate and lignin, modified with silicic acid.
Keywords: Erysiphales, micromycetes, silicon-containing mixes, nutrients, plant resistance
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