The Effect of Phytohormonal Steroids in Combination with Succinic Acid on the Resistance of Hordeum Vulgare L. to Helminthosporium teres Sacc.

Aim: The aim of this investigation is study the BS effect on growth Helminthosporium teres Sacc. and to elucidate protective brassinosteroids their tetrahemisuccinates spring barley ( Hordeum Vulgare L.) exposed biotic stress caused by phytopathogenic fungus. Background: Brassinosteroids are considered as protectors fungal infection H.teres . Objective: Evaluation brassinosteroids, mixtures conjugates with succinic acid against pathogen , well in crops a natural infectious background. Methods: fungistatic activity was evaluated relation fungus derivatives processes adaptation plants net spotting studied model pathosystem agrocenosis. Results: A synthesized substances revealed, which consists inhibiting solid nutrient medium 35-40%. Succinic can enhance more noticeable when using than mechanical mixtures. In field experiments, it shown that compounds applied single spraying beginning tubing phase reduced development leaf spots fungi. Conclusion: results obtained indicate both form show activity.