DISSEMINATION AND DEVELOPMENT OF SEPTORIOSIS IN SPRING WHEAT, DEPENDING ON WEATHER CONDITIONS IN THE NORTH OF KAZAKHSTAN

Abstract

Wheat is the main product in 53 countries, including in our country. The leading producers of wheat grain in Kazakhstan are Akmola, Kostanay and North Kazakhstan regions. The virulence of previously weakly pathogenic pathogens, for example, spotted wheat leaves caused by many imperfect fungi from the genera Septoria and others, has increased. The purpose of the study is to conduct phytosanitary monitoring of the spread and development of spring wheat septoria and to study the influence of weather conditions on the development of the disease. The technique is generally accepted in phytopathological studies. In 2018, favorable weather conditions were elaborated for the development of Septoria on spring wheat. A high correlation in all studied varieties was observed between the degree of manifestation of the disease and the number of days with precipitation > 1 mm. 2019 was an unfavorable year for the development of septorious spots, the disease was depressed. A close negative correlation was found on all wheat varieties between the degree of development of the disease and the number of days with precipitation > 1 mm. Phytosanitary monitoring of the spread and development of spring wheat septoria is required annual monitoring to conduct a complex of preventive and protective measures to limit them.