Influence of the treatment with foliar herbicides on malting barley (Hordeum vulgare L.)
2008
Atanasova, D., Institute of Agriculture, Karnobat (Bulgaria)
Field trial with malting barley cultivars Obzor and Emon has been conducted at the Institute of Agriculture - Karnobat during the 2003-2005 period. The influence of broadleaf (dicotyledonous) herbicides alone and of their combination with wild oat (monocotyledonous) herbicides, applied in the tillering stage of the crop in optimum and double doses, is investigated. The herbicides selectiveness’ according to the scale EWRS and productive tillering, plant height, spike length, number of grains per spike, weight of the grain in the spike are analyzed. After the harvest the grain yield and the weight of 1000 grains are recorded. It has been established that the herbicides Derby 175 SK - 0.07 l/ha, Sekator WG - 0.30 kg/ha and Lintur 70 WG - 0.15 kg/ha express good efficiency against the weeds in winter barley field. They contribute to the yield increase to 0.59 t/ha more than the weedy control. The cited herbicides do not have any undesirable effect on the two-row barley productive potential when applied in optimum doses. The combination of herbicides against dicotyledonous and monocotyledonous weeds should be applied carefully because of their negative effect on the yielding capacity and do not contribute to the requirement of high yield in slightly weedy crops. The cultivar Obzor is proved to be more resistant to all investigated herbicides, while the cultivar Emon is more susceptible
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