Chemical weed control in soybean (Glycine max, L.)
2014
Gehring, Klaus | Festner, Thomas | Gerhards, Roland | Hüsgen, Kerstin | Thyssen, Stefan
The plant protection service of Bavaria and Baden-Württemberg conducted from 2010 – 2013 a field trial program on different locations for the development and evaluation of chemical weed control methods in soybean. In this trails the use of herbicides enabled a yield of +4 dt*ha-1 respectively 118 % in comparison to untreated control. The selectivity of herbicide applications was uncomplicated except for treatments with inclusion of Pendimethalin. Cleavers (Galium aparine) and black bindweed (Polygonum convolvulus) were harder to control than other common weeds. Cockspur grass (Echinochloa crus-galli) was also insufficient controlled, but there was no addition use of specific grass weed herbicides in the application programs. The total weed control efficacy for all treatments was proved in a range of 84-97 %. Fat-hen (Chenopodium album) as the most important weed in soybean could be controlled by specific herbicide treatments in a range of 83-99 %. For integrated weed management it is necessary to consider the site specific weed spectrum, herbicide specific efficacy and the amount in respect to the local soil and weather conditions. As a result of the trials it was possible to authorize the minor use of three further herbicides in soybeans. In consequence there is a comfortable variety of different herbicides in soybean available.
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