Soyabean cultures, especially those from the Danube Meadow, Baneasa, Romania, are very strongly infested with Johnson grass ( Sorghum halepense), which causes large damages, by reducing production by 40-85%, depending on the infestation degree. Before the synthesis of special herbicides for Johnson grass control, this species was controlled by practicing deep tillage, repeated operations with the disk, and, after the sprouting of soya plants, by mechanical and manual hoeings. In the Danube Waterside, the lack of labour force for the manual hoeing is very sharp. For this reason, there was an enlarged usage of herbicides for annual weed control (monocotyledonous and dicotyledonous), including Johnson grass. For the control of Johnson grass species, in the conditions of the Danube Meadow, the best results were obtained with the herbicides Fusilade Super [fluazifop-P], Targa Super [quizalofop-P], Agil [propaquizafop] and Select [clethodim], and for the control of annual dicotyledonous species, with the herbicide Pivot 100LC [imazapyr].
