STUDY OF POSSIBILITY APPLYING HERBICIDES AT DIFFERENT GROWTH STAGE OF CEREALS
Biological and economic efficiency herbicide Uniko (100 g / l fluroxypyr + 2.5 g / l florasulam; application rates 1.0; 1.25; 1.5 and 1.75 l / ha) was studied in the field trials. There were 3 times of spraying cereals: tillering, booting and heading. Trials with use of herbicide in the latest phase was made for the first time in the Russian Federation.The experiments were laid in accordance with the “Guidelines for registration testing of herbicides in agriculture” in 2016 and 2017. Using the 1.0 l / ha of herbicide Uniko in the early phase of crops growth and development efficiency provided 66,4-83,4%. This was more effective than using 0.43 l / ha standard Demetra (350 g / l of fluroxypyr). An increase in the rate of application herbicide Uniko led to an increase in the level of its biological efficiency to 68.8-91.0% (1.25 l / ha), 72.4-95.3% (1.5 l / ha) and 76.5 -97.3% (1.75 l / ha). The use of the maximum rate of application standard Demetra (0.57 l / ha) provided a less efficiency (62.4-86.7%). Herbicide Uniko was more that standard destroying these types of weeds as Papaver rhoeas L., Sonchus arvensis L., Cirsium arvense (L.) Scop., Chenopodium album L. Amaranthus retroflexus L.Late treatments were typically up to 25% less effective than treatments at tillering stage of cereals. But in the case of the late emergence of Convolvulus arvensis L. late treatments were can be effective.According to the results of the research herbicide Uniko was recommended for use on the territory of Russian Federation.