In the years 2005-2007 was conducted weed survey on the farms in conversion to ecological farming system. The aim was to detect the most harmful weeds, as important biotic, environmental stress factor, on the farms in the canopies of pea for grain in all production region of the Slovak Republic. The actual weed infestation was evaluated by standard methods common used by EWRS a numerous method per square. In the pea for grain 6 weed species were detected, the most problematic were: perennial weed (Cirsium arvense), annual weeds (Persicaria spp., Tripleurospermum perforatum, Avena fatua, Chenopodium spp., Atriplex spp.).

weed infestation; conversion; ecological farming system; pea for grain

Presentation: oral