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 and 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.