Effective combination of herbicides in crops of soy bean

The aim of the research was to study the combination of modern herbicides in soybean crops for effective protection from the community of weeds. The objects of research were the cultivars of local soybean selection Mezenka, herbicides Harmony Classic, Zellek Super, Harmony, Basagran, Zellek Super, Algorithm, and Hermes. The farm scale trials were carried out in 2017-2018 in the Oryol region. An effective combination of herbicides to protect soybeans is connected with the selection of products in accordance with community weeds species composition and the timeliness of the application in the most sensitive phase of development of weeds and the least sensitive phase of crop. In the context of the year 2017 herbicides Harmony Classic 0.05 kg/ha, or Harmony 0.008 kg/ha with the use of herbicide Algorithm increased the grain of the soybean on average 0.4 t/ha compared to using only the herbicide Algorithm. In the face of growing period 2018, high efficiency (97-98%) was shown by a combination of herbicide Harmony Classic 0.05 kg/ha + Zellek Super 1.0 l/ha, Harmoni 0.008 l/ha + Basagran 2.0 l/ha + Zellek Super 1.0 l/ha, Harmony Classic l/ha 0.05 kg/ha + Zellek Super 1.0 l/ha (separate application), Harmoni 0.008 l/ha + Zellek Super 1.0 l/ha (separate application) compared to using herbicide Hermes, which showed biological efficacy against weeds 71%. The use of herbicide Hermes, led to a decrease in the weeds, but not noticeably reduced the competitiveness of weeds, remaining alive after treatments. The usage of herbicides Harmony and Harmony Classic combined with herbicides Zellek Super and Basagran increased soybean grain by 0.44-0.3 t/ha compared to the commercial version and 0.76-0.9 t/ha, compared with the control group.