Yield and sowing quality of durum spring wheat seeds depending on treatment of crops with fungicides and insecticides

Topicality. Diseases and pests cause significant damage to spring wheat crops and can dramatically reduce grain yields and deteriorate sowing quality of seeds. Effective pest control requires rational and scientifically based application of crop protection products. Purpose. To investigate the effect of fungicide and insecticide treatments during different development stages of spring durum wheat on the seed yields and sowing quality. Materials and Methods. Fungicides Funhisyl, Aviator and insecticides Kanonir Duo, Engio 247 SC were investigated on durum spring wheat varieties. Results. Appling the fungicides increased the grain yield of varieties by 0.18–0.47 t/ha. The MIP Kseniia and MIP Magdalena varieties cropped higher yields in variants with application of Funhisyl and Kanonir Duo during three stages of organogenesis, and of MIP Perlyna variety – of Aviator and Kanonir Duo. When applying only fungicides, the highest yield was obtained after three treatments with Aviator. Applying only insecticides resulted in yields of varieties at the level of 3.29–3.62 t/ha. A greater increase in the yield of the MIP Kseniia and MIP Magdalena varieties was obtained due to treatment with Engio at the VIII and X stages of organogenesis, and the varieties of MIP Perlyna – Kanonir Duo. In variants with spraying with plant protection products, an improvement in the sow-ing qualities of seeds was noted. The best indicators were obtained to applying fungicide Fungisyl during three stages of organogenesis and in combination with insecticide Kanonir Duo during X stage of organogenesis. Conclusions. Application of fungicides Fungisyl (0.5 l/ha) and Aviator Xpro 225 ES (0.6 l/ha) and insecticides Kanonir Duo (0.1 l/ha) and Engio 247 SC (0.1 l/ha) on durum spring wheat crops during the growing season contributes to an increase in grain yield and improvement of sowing quality.