Dynamics of development of helminthosporium foot rot of spring barley and efficiency of its inhibition by fungicides in connection with variety tolerance

摘要

It was investigated the development of helminthosporium foot rot on spring barley plants with various susceptibility to disease and efficiency of fungicides at different conditions of cultivation. droughty condition and high level of infectivity lead to decrease of plants resistance and efficiency of fungicide action. At more suitable conditions fungicides protect the plants, inhibit helminthosporium foot rot and rise the harvest of crop.