Features of Sorghum bicolor l. sustainability to biotic stress factors in arid conditions of the south-east of Kazakhstan

Abstract

The main factors that influence the growth and development of sorghum (Sorghum bicolor L.) in arid conditions of the South-East of Kazakhstan are identified. It was determined germination energy and germination of seeds of different genotypes of sweet sorghum. Sorghum seed was found to be affected by fungal and bacterial microflora. Phytoexamination showed that sweet sorghum was affected by microflora belonging to the genera Fusarium, Alternaria, Penicillium, Aspergillus, Mucor, Helminthosporium, which cause mold and seed rot. On the basis of the symptom of the manifestation of the disease and the results of isolation and identification of fungi and bacteria, it was established that the plants of sweet sorghum were affected by Fusarium wilt, root rot and sample SAB-11 was affected by dusty smut. As a result of the studies, the genotypes of sweet sorghum (Sorghum bicolor L.) resistant to biotic stress factors of the environment in the arid conditions of the South-East of Kazakhstan were selected.