The effect of Pulsar herbicide on yield and quality of soybean seeds under the conditions of the Amur River Region

Abstract

This article provides data of 2017-2019 on the effect of the Pulsar herbicide (a.i. is imazamox) on the yield and quality of seeds of the Kitrossa mid-season soybean variety under the conditions of the Amur River Region. Vegetative plants were sprayed with the Pulsar herbicide in a dose of 0.8 l/ha at the stage of the third ternate leaf. As the result of the studies performed it was found that over three years the use of the Pulsar herbicide on the average led to a decrease in plant survivability before harvesting by 6 % compared to the control. As the result of studying the structure of the crop it was revealed that, on average, over the years of research, the treatment of vegetative soybean plants of the Kitrossa variety with herbicide led to a decrease in the number of pods by 2 pcs/per 1 plant (LSD₀₅ = 1.1 pcs/ per 1 plant), the weight of seeds from 1 plant – by 0.7 g (LSD₀₅ = 0.5 g). Depending on the use of the herbicide under study and prevailing weather conditions, biological yield decreased by an average of 0.3 t/ha during the years of research. The germinating energy in the obtained seeds in the variant with the Pulsar herbicide use decreased by 5 %, the crude protein content – by 0.6 % and oil by 0.39 % compared to the control variant without the herbicide use. There was noted a tendency to increasing the number of abnormally developed germinants by using the studied herbicide.