Prognosis of the harmfulness of barley rust

Abstract

D.T. Gentosh, V.A. Hlymiazny, O.V. Bashta, N.M. Voloshchuk, T.S. Shmyhel, H.M. Kovalyshyna, O.M. Makarchuk, Y.M. Dmytrenko, S.V. Stankevych, E.V. Shapetko

The dynamics of distribution and development of barley spring rust were studied. The maximum spread of the disease ranged from 21.75 % to 30.0 % over the years of research, with intensity from 13.25 % to 19.0 %, respectively. The influence of the disease on the indicators of the structural elements of the spring barley harvest is noted. A close correlation was established between them (r = 0.973, r = 0.980 and r = 0.973). Prognostic models of crop yield losses from rust have been developed. It is possible to predict the loss of spring barley harvest from the disease according to the regression equations Y = 0,169X + 1,224; Y = 1.77X + 23.38 and Y = 1.73X + 26.48.

Keywords: spring barley, rust, close correlation, plant protection, yield, disease development
 

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