Distribution and harmful root decay of wheat

Abstract

Root decay is a disease of the roots and basal part of the stems of wheat, caused by one species or a complex of species of semi-parasitic fungi. This article presents the results of a survey of wheat crops in the conditions of irrigated agriculture in the farms of the Tashkent region in Uzbekistan. It has been established that wheat root decay is ubiquitous and varies from 20.8-60.8%. This disease reaches its greatest development in the seedling phase. The intensiv? variety was the most affected by root decay. The harmfulness of root decay is manifested in the shortening of the length of the stem, a decrease in the number of grains per ear, and the deterioration of the sowing qualities of seeds. The manifestation of root decay is affected by temperature, humidity and wheat precursors. It has been established that infection of plants occurs at a moisture content of 40% of the total moisture capacity. The most favorable effect on limiting the disease is provided by such a precursor as alfalfa.