Influence of herbicides and their tank mixtures on phytosanitary status of sowing and yield of spring barley in the ryazan region

Abstract

The results of the 2-year field experiments on post-emergence herbicides and their tank mixtures are given: Gorgon, 50% VRK (MCPA 350 g/L + picloram - 150 g/L) - 0.17 L/ha + Magnum Super, 75% VDG (tributuron-methyl - 450 g/kg + metsulfuron-methyl-300g/kg) - 0.012kg/ha, Deimos, 48% VRK(dicamba - 480 g/L) - 0.2 L/ha + Magnum Super, 75% VDG - 0.012 kg/ha, Balerina, 41.7% SE (2,4-D ester-410 g/L + 7.4 g/L florasulam) - 0.4 L/ha + Magnum Super, 75% VDG - 0.012 kg/ha, and factory products: Derby 175, 17.5% SK (flumetsulam - 100 g/L + florasulam - 75 g/L) - 0.07 L/ha, Lancelot 450, 45% VDG (aminopyralide 300 g/kg + florasulam - 150 g/kg) - 0.033 kg/ha used to reduce weed infestation of crops spring barley and to increase its yield. The crops were infested with 9 kinds of annual dicotyledonous weeds (Chenopodium album, Galeopsis, Amaranthus retroflexus, Fallopia convolvulus, Persicaria lapathifolia, Galium aparine, Stellaria media, Viola arvensis) up to 82 pcs/m² and two kinds of perennial dicotyledonous weeds (Sonchus arvensis, Cirsium arvense) - up to 10 pcs/m². There was established that the tested preparations successfully reduced weed infestation with annual dicotyledonous weeds by 97% and perennial dicotyledonous weeds by 94% and increased the yields by 5.8-7.5 c/ha.