Weeds are unwanted plants that grow on agricultural land, pastures, parks, gardens, industrial land, airports, etc., producing various and enormous damage. The accurate knowledge of weed infestation is currently an important tehnological sequence in integrated weed control and helps to establish differentiated strategies for reducing these very damaging species to a level that does not affect wheat production. Too many weeds on 1 m(2) raise serious problems in terms of rotation, demanding necessary agricultural machinery, chemicals, etc. Winter cereals are infested by about 147 weed species. The accurate knowledge of the infested areas and the dominant species of different fields allow the farmer to plan in advance the necessary machinery, fuel and herbicides for weed contro lwith minimal environmental pollution. Weed mapping was initiated in 1973, aiming to establish the quantitative and qualitative level of weed infestation in farms. This paper refers exclusively on weed mapping in wheat between 2010 and 2012 at a farm belonging to S.C. ORGANIC PROD LTD, the Mihail Kogalniceanu area, Constanta county. The species found were: Brassica nigra, Cannabis ruderalis, Chenopodium album., Cirsium arvense, Convolvulus arvensis, Descurainia sophia, Fumaria officinalis, Galium aparine, Lamium amplexicaule, Polygonum convolvulus, Setaria sp., Sonchus arvensis and Xanthium italicum. The results of this paper are the subject of doctoral theme.
