Iliana Ivanova1, Diana Marinova1, Daniela Kertikova2 and Anna Ilieva2
1 Agricultural Academy, Institute of Agriculture and Seed Science “Obraztsov Chiflik”, 7000 Rousse, Bulgaria
2 Institute of Forage Crops, 5800 Pleven, Bulgaria
Ivanova, I., Marinova.D., Kertikova, D. & Ilieva, A. (2023). Study on the chemical composition of alfalfa varieties attacked by Uromyces striatus Schroter. Bulg. J. Agric. Sci., 29 (2), 351–358
During the period 2011-2018 a study on the changes in the biochemical composition of Bulgarian alfalfa varieties (Obnova 10, Pleven 6, Prista 2, Prista 3, Prista 4, Mnogolistna 1 and Victoria), infested by rust caused by the basidiomycete fungus Uromyces striatus (Schroter).
The study was conducted in the biochemistry laboratories of the Institute of Agriculture and Seed Science “Obraztsov Chiflik”, Rousse and Institute of Forage Crops, Pleven.
It was found that: The obtained experimental results for the content of macroelements prove the negative influence of Uromyces striatus (Schroter) on the changes of some biochemical indicators in the leaves of the Bulgarian alfalfa varieties included in the experiment. Correlations were found between dependencies between the attack index of Uromyces striatus (Schroter) and the protein content (r = 0.55), sugars (r = 0.36), total phenols (r = – 0.76), saponins (r = – 0.38) and which prove that the disease affects the indicators that determine the quality of fodder. All Bulgarian alfalfa varieties included in the experiment can be conditionally defined as susceptible to rust (Uromyces striatus Schroter).