PECULIARITIES OF COMBINING AGROTECHNICAL AND CHEMICAL METHODS OF SOYBEAN WEEDS CONTROL IN THE PRIAZOV ZONE OF ROSTOV REGION
The purpose of the study was to determine the peculiarities of combining agrotechnical and chemical techniques used in soybean weeds control in the Priazov zone of Rostov Region, when optimizing the factors influencing the above crop vegetation. The study was conducted in 2016-2017. The trials were devoted to improving the elements of the technology of soybean plant weeds protection. It is stated that one of the prospective techniques was the double harrowing of crops, namely the pre- and post-germination soil treatment, which made it possible to suppress effectively the annual weeds growth and, to a certain extent, it reduced the use of chemical methods of weeds control. It is ascertained that mechanical methods of weed control provided a corresponding increase in soybean yields from 5.1 to 6.3 cwt/ha (50.0-62.0%), the use of Pulsar (1 l/ha) contributed to a similar increase by 7.0 cwt/ha (68.6%). The most effective were the combined methods of weeds control, including both mechanical and chemical treatments, which resulted in the crop yield increase by 8.5-9.6 cwt/ha (83.3-96.6%), as compared with the control.