Die beheer van Amaranthus spp. en die invloed daarvan op Digitaria eriantha gedurende die vestigingsjaar

Abstract

The control of Amaranthus spp. and the influence thereof on Digitaria eriantha during the season of establishment. Chemical control of Amaranthus spp. in newly established Smuts finger grass (D. eriantha) was investigated. A mixture of 800 ml 2,4‐D Amine+1200 ml Atrazine per ha was applied. This treatment produced a total yield of 6,1 t/ha of which 4,6 t/ha (75,4%) consisted of Smuts finger grass. The rest were weeds. In the case of no chemical control total yield amounted to 4,5 t/ha dry matter of which only 0,7 t/ha (15,5%) was Smuts finger grass. Chemical control clearly had economic advantages.

Die chemiese beheer van Amaranthus spp. in nuut gevestigde Smutsvingergras (D. eriantha) is ondersoek. ‘n Mengsel van 800 ml 2,4‐D Amien+1200 ml Atrazien per ha is toegedien. Met hierdie behandeling is ‘n totale DM‐produksie van 6,1 t/ha verkry waarvan Smutsvinger 4,6 t/ha (75,4%) uitgemaak net. Die res was onkruid. Waar geen onkruidbeheer toegepas is nie, was die totale DM‐produksie 4,5 t/ha, waarvan slegs 0,7 t/ha (15,5%) Smutsvingergras was. Eersgenoemde behandeling blyk ekonomiese voordele in te hou.

Additional index words:

• Atrazine
• chemical weed control
• Smuts finger grass
• 2,4‐D