Accumulation properties and foliar limb effects of tetracycline and metabolites in Lactuca sativa L., Eruca sativa L. and Spinacia oleracea L.

Obtaining high productions with corresponding indexes of quality for bakery, for the agricultural potential of the West area requires the ensura nce of a culture technology specific to the fall wheat in which the chemical destruction of the weeds has got a decisive role. The chemical destruction of the weeds has in view the establishing of the latter composition, the types of predominant weeds: m onocotyledonous,annual or evergreendicotyledonousand the culture's degree of weed infestation. In order to realize an increased efficiency of the herbicide action some ,combined herbicides must be used or some new ones which contain more elements wit h a large spectrum of destruction. The study related to the chemical control of the weeds from the winter wheat culture has been done at the agricultural farm fromLes-Bihor, on a brown-luvic soil over the period 2010 -2012.