Parlagfű ellenes bioherbicid vizsgálata

Abstract

The aim of our study was to evaluate the effectiveness of a new, natural weed control method. Weed species readness was studied before and after spaying the bioherbicide. Effectiveness of total and selective doses of the bioherbicide was evaluated by testing the germination inhibitory effect on common millet (Panicum miliaceum L.) seeds under laboratory circumstances; in addition to it, small plot experiments were conducted in 2016 and 2017 on area heavily infested with common ragweed in front of Knorr site and in Mécses street in Kecskemét; as well as mode of action of the bioherbicide was investigeted by fluorescence inducation. From the results of our laboratory tests, it can be concluded, that germination potential of common millet seeds was significantly decreased by the 3.0% and 6.0% solutions of the bioherbicide, so the germination inhibitory effect can be considered significant. In the small plots experiments, the 6.0% solution showed a total herbicidal effect, the 3.0% selective dose left behind the monocotyledonous species, while the common ragweed and the canadian horseweed. Exellent bioherbicide effect was detected over one year, because a year after the treatment common ragweed was barely found in the area, while natural vegetation was already been restored. Investigation of the mode of action of the bioherbicide with fluorescence induction confirmed its photosynthesis inhibitory effect within the PS II. system. The formulation used in our experiments is a bioherbicide, wich contains allelochemicals with photosynthesis inhibitory effect. Bioherbicides are a completely new inventions, since in this area mainly synthetic herbicides are used, which are more toxic, may accumulate and may cause human health problems. With the half of them, producers can get an other tool of controlling weeds besides mechanical control measures within ecological farming. Moreover, it would be worth testing selective dodes of bioherbicides in monocotyledonous cultures, because it may be effective in maize, wheat and onion to control  dicotyledonous weeds.