Abstract:
The herbicides tested in the monoecious hemp crops from the Agricultural
Research and Development Station of Secuieni, Neamţ County, on a typical Cambic
Chernozem with 2.7% humus, 34% clay and a pH of 5.8, have shown a high degree of hemp
susceptibility to herbicides. Herbicides Guardian (2.2 l/ha), Dual Gold (1.5 l/ha) and Fusilade
forte (1.0 l/ha) were better tolerated by hemp crops, while herbicides Sencor, Lontrel 300,
Logran and Granstarm were not tolerated. As concerns the efficiency of herbicides in
controlling weeds, we found out changes in the dynamics of weed encroachment, differentiated
according to used herbicides and climatic conditions. Guardian (2.2 l/ha) and Dual Gold (1.5
l/ha) have controlled annual mono- and dicotyledonous weeds by 65 and, respectively, 55%.
The obtained seed yields were influenced by herbicide selectivity and efficiency, but also by
climatic conditions.
